TY  - BOOK
AU  - Northrup David
TI  - Trade without rules :  Pre-colonial economic develo   
T2  - Oxford Studies in African Affairs
SN  - 0198227124
U1  - X:54.654.N7, L8 
PY  - 1978///
CY  - Oxford
PB  - Clarendon Press         
KW  -  Economics
KW  - International Trade
N1  - Bibliography: p 240-58
ER  -