Cressy, Edward.
Discoveries and inventions of the twentieth century. - 3d ed., rev. and enl. - London, New York, G. Routledge and sons, limited; E.P. Dutton and co., 1930. - 476 p.
30015085
Inventions.
T20 / .C8 1930
Discoveries and inventions of the twentieth century. - 3d ed., rev. and enl. - London, New York, G. Routledge and sons, limited; E.P. Dutton and co., 1930. - 476 p.
30015085
Inventions.
T20 / .C8 1930