TY  - BOOK
AU  - Pubols, Ben H.
AU  - Heisig, Carl P.
AU  - Orrand, Alden E. 
TI  - Ferming systems and practices and their relations hip to soil conservation and farm income in the wheat region of Washington
U1  - PA-C 631.4 B85 
CY  - Washington
PB  -  State College of Washington. Agricultural Experiment Station
KW  - Suelos
KW  -  conservación
KW  -  EUA
KW  - Trigo
N1  - Enc. con otros impresos similares
ER  -