TY  - BOOK
AU  - Gates,Jane Potter
TI  - Conservation tillage: january 1991 - december 1993
T2  - Quick bibliography series
SN  - 1052-5378
U1  - 631.51016 
PY  - 1994///
CY  - Maryland, EUA
PB  - National Agricultura Library
KW  - Bibliografía
KW  - Labranza cero
KW  - Labranza de conservación
ER  -