TY  - BOOK
AU  - Williams,Colin
TI  - Simple economics and book keeping / 
SN  - 9251030022
PY  - 1992///
CY  - Rome : 
PB  - Food and Agriculture Organization of the United Nations , 
KW  - Fish-culture
KW  - Accounting
KW  - Economics
N1  -  Includes bibliographical references and index
ER  -