Those inventive Americans.
Those inventive Americans.
Produced by the National Geographic Special Publications Division. Foreword by Leonard Carmichael.
- [Washington, National Geographic Society, 1971].
- 231 p. illus. (part col.), ports. (part col.) 27 cm.
- [National geographic special publications]. .
0870440896
75125340
Inventors--United States.
T39 / .T5
609/.73
0870440896
75125340
Inventors--United States.
T39 / .T5
609/.73