The sources of invention /
Jewkes, John, 1902-
The sources of invention / by John Jewkes, David Sawers [and] Richard Stillerman. - 2d ed. [rev. and enl.]. - New York : W. W. Norton, [c1969] - 372 p. : ports. ; 20 cm. - Norton library N502 .
Includes bibliographical references.
039300502X
79090986
Inventions.
T212 / .J4 1969b
608.7
The sources of invention / by John Jewkes, David Sawers [and] Richard Stillerman. - 2d ed. [rev. and enl.]. - New York : W. W. Norton, [c1969] - 372 p. : ports. ; 20 cm. - Norton library N502 .
Includes bibliographical references.
039300502X
79090986
Inventions.
T212 / .J4 1969b
608.7