TY  - BOOK
AU  - Hutcheson, Thomas Barksdale.
TI  - The production of field crops, a textbook of agronomy
U1  - 633 
PY  - 1948///
CY  - New York
PB  - McGraw-Hill
KW  - Agricultura
KW  - E.U.A
KW  - Cultivos
ER  -