TY  - BOOK
ED  - Academia Nacional de Ciencias. Washington, D. C.
TI  - Status and methods of research in economic and agronomic aspects of fertilizer response and use
T2  - NAS. Publication
U1  - 631.88 
PY  - 1961///
CY  - Washington
PB  - NAS
KW  - Abonos
KW  - Fertilizantes
KW  - Experimentación
ER  -