TY  - BOOK
AU  - Hughes, D. Harold
AU  - Henson, R. Edwin
TI  - Crop Production Principles and Practices: A Handbook of Information for the Student of Agriculture
U1  - 633 
PY  - 1930///
CY  - New York
PB  - The Macmillan Companny
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Field crops
ER  -