TY  - BOOK
AU  -  Haystead,Ladd
AU  -  Fite,Gilbert Courtland
TI  -  The agricultural regions of the United States / 
U1  -  333.760973 
PY  - 1955///
CY  -  Norman : 
PB  -  University of Oklahoma Press, 
KW  -  Agriculture
KW  -  United States
N1  -  "Notes on sources and additional reading" : p. 276-280
ER  -