Crowther, J. G.
Discoveries and inventions of the 20th century / J. G. Crowther. - London : Routledge & Kegan Paul, c 1966. - xix, 434 p. : ill. ; 26 cm.
Includes index.
316 316
Invention--20th century.--History
608.7 / C886d
Discoveries and inventions of the 20th century / J. G. Crowther. - London : Routledge & Kegan Paul, c 1966. - xix, 434 p. : ill. ; 26 cm.
Includes index.
316 316
Invention--20th century.--History
608.7 / C886d