TY  - BOOK
ED  - National Geographic Society (U.S.).
TI  - Those inventive Americans
T2  - [National geographic special publications]
SN  - 0870440896
AV  - T39 .T5
U1  - 609/.73 
PY  - 1971///
CY  - [Washington
PB  - National Geographic Society
KW  - Inventors
KW  - United States
ER  -