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Syrocki, B. John,

What is a machine / B. John Syrocki ; Pictured by Gregory Orloff. - Chicago : Benefic Press, [1960] - 45 p. : ills. ; 20 cm. - The What is it series .

323 323

60006587


Readers--Technology.

621.9 / S85W
Last Updated on June 15, 2020
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