TY  - BOOK
AU  - Black. John Donald
TI  - Introduction to economics for agriculture / 
U1  - 631.1 22
PY  - 1953///
CY  - New York : 
PB  - Macmillan. 
KW  - Agriculture--Economic aspects
KW  - Economics.
N1  - Includes indexes.
UR  - http://catalog.loc.gov/vwebv/holdingsInfo?searchId=244&recCount=25&recPointer=1&bibId=9316847
ER  -