TY  - BOOK
AU  - Alpers Edward A
TI  - Ivory and slaves :  Changing pattern of internation   
SN  - 0520026896
U1  - X:54.61.M9, L5 
PY  - 1975///
CY  - Berkeley
PB  - University California Press        
KW  -  Economics
KW  - International Trade
N1  - Bib p 269-86
ER  -