TY  - BOOK
AU  - Black,John
AU  - Bradley,J.F.
TI  - Essential mathematics for economists
SN  - 0471276596 
AV  - HB135 .B54 1980
U1  - 510/.2/4339 
PY  - 1980///
CY  - New York
PB  - J. Wiley
KW  - Economics, Mathematical
N1  - Includes index
ER  -