Sufia Kamal National Public Library Online Search for 'se,phr:"The What is it series."'

What is heat /

By Munch, Theodore W.. Chicago : Benefic Press, 1960 . 46 p. : 21 cm..

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What is a cell /

By King, Fred M.. Chicago : Benefic Press, 1961 . 47 p. : 20 cm..

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What is Space /

By Kane, Elmer R.. Chicago : Benefic Press, 1962 . 47 p. : , Includes index. 20 cm..

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What is a chicken /

By Darby, Gene.. Chicago : Benefic press, 1963 . 48 p. : 20 cm..

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What is matter /

By Posin, Daniel Q.. Chicago : Benefic press, 1962 . 48 p. : 20 cm..

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What is a machine /

By Syrocki, B. John.. Chicago : Benefic Press, 1960 . 48 p. : 20 cm..

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What is a plant /

By Darby, Gene.. Chicago: Benefic Press, 1960 . 47 p. : 20 cm..

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What is a star /

By Posin, Daniel Q.. Chicago : Benefic press, 1961 . 48 p. : 20 cm..

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What is a fish /

By Darby, Gene.. Chicagon : Benefic Press, 1958 . 48 p. : 21 cm..

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What is a solar system /

By Munch, Theodore W.. Chicago : Benefic Press, 1961 . [48] p. : 20 cm..

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What is a rock /

By Syrocki, B. John.. Chicago: Benefic Press, 1961 . 48 p. : 20 cm..

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What is an insect /

By Neal, Charles D.. Chicago: Benefic Press, 1961 . 47 p. : 20 cm..

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What is a tree /

By Darby, Gene.. Chicago : Benefic Press, 1957 . 48 p. : 21 cm..

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What is gravity /

By King, Frederick M.. Chicago : Benefic Press, 1960 . 43 p. : 21 cm..

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What is electronic communication /

By Posin, Daniel Q.. Chicago : Benefic Press, 1963 . 47 p. : 20 cm..

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What is air /

By Piltz, Albert.. Chicago : Benefic Press, 1960 . 48 p. : 20 cm..

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What is a butterfly /

By Darby, Gene.. Chicago : Benefic press, 1958 . 48 p. : 20 cm..

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What is electricity /

By Syrocki, B. John.. Chicago : Benetic Press, 1960 . 48 p. : 21 cm..

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What is chemistry /

By Posin, Daniel Q.. Chicago : Benefic Press, 1961 . 47 p. : 21 cm..

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What is rodent /

By Wescott, Alita C. . Chicago : Benefic, 1962 . 48 p. : 21 cm. .

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What is a bird /

By Darby, Gene.. Chicago : Benefic Press ; 1960 . 48 p. : 21 cm..

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What is water /

By Hagaman, Adaline P.. Chicago : Benefic Press, 1960 . 47 p. : 20 cm..

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What is a machine /

By Syrocki, B. John,. Chicago : Benefic Press, 1960 . 45 p. : 20 cm..

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What is a rocket /

By Munch, Theodore W.. Chicago : Benefic Press, 1961 . 47 p. : 20 cm..

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What is light :

By Munch, Theodore W.. Chicago : Benefic Press, 1962 . 47 p. : 21 cm..

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What is a fish /

By Darby, Gene.. Chicago : Benefic Press, 1958 . 48 p. : 20 cm..

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What is a frog /

By Darby, Gene.. Chicago : Benefic Press, 1957 . 48 p. : 20 cm..

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Handbook of economics :

By Badiuzzaman.. Dhaka : Abir publication, 2019 . 440 p. ; 22 cm.. 984-70146-0010-4

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The trees /

By Richter, Conrad . New York : Alfred Richter, 1947 . 302 p. : 22 cm..

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The human factor in changing Africa /

By Herskovits, Melville J. . New York : Knopf, 1967 . xiv, 500 p. : 22 cm..

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The constitution of the Islamic Republic of Pakistan /

Lahore : Indus publishers, 1967 . 160 p. : 23 cm..

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What is a season /

By Darby, Gene.. Chicago : Benefic Press, 1962 . 48 p. : 20 cm..

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What is a cow /

By Darby, Gene.. Chicago : Benefic Press, 1957 . 48 p. : 20 cm..

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What is a simple machine /

By Darby, Gene.. Chicago : Benefic Press, 1961 . 48 p. : 20 cm..

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What is an atom /

By Reuben, Gabriel H. . Chicago : Benefic Press, 1960 . 48 p. : 20 cm..

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What is the earth /

By Darby, Gene.. Chicago : Benefic Press, 1961 . 48 p. : 20 cm..

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What is sound /

By Reuben, Gabriel H.. Chicago : Benefic Press, 1960 . 46 p. : 20 cm..

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