TY  - BOOK
AU  - Gottschalk,Louis  .
AU  - Mackinney,Loren C  .
AU  - Pritchard,Earl H  .
TI  - History of mankind cultural and scientific development / 
U1  - 909 
PY  - 1969///
CY  - NULL : 
PB  - Technology and society , 
KW  - WORLD-HISTORY
N1  - NULL
ER  -