TY  - BOOK
AU  - Snowman,Daniel
TI  - America science 1920
U1  -  320.97309 
PY  - 1968///
CY  - New York
PB  - Haper & row
KW  -  United States
KW  -  History
KW  - 20th century
N1  - Include index and bibliorgaphy
ER  -