TY  - BOOK
AU  -  Black,John
TI  -  Economics for agriculture : :  selected writing / 
U1  -  338.1081 
PY  - 1959///
CY  -  Cambridge : 
PB  -  Howard University Press, 
KW  -  Agriculture
KW  -  Economic aspects
N1  -  Includes bibliographical references and index
ER  -