TY  - BOOK
AU  - Kipps,Michael Smith
AU  - Wolfe,T.K.
TI  - Production of field crops: a textbook of agronomy 
AV  - SB185.K56 1970 
PY  - 1970///]
CY  - New York
PB  - McGraw-Hill
KW  - Field crops
KW  - Agronomy
N1  - Fifth ed. by T. K. Wolfe and M. S. Kipps
ER  -