TY  - BOOK
AU  - Dvortsov, E. F.
AU  - Polyak, A. Y.
ED  - Comisión Económica Europea.
TI  - High - powered tractors and their implements, including aspects of their impact on the soil
T2  - AGRI/MECH report
PY  - 1979///
CY  - New York
PB  - United Nations
KW  - Labranza
KW  - Efecto en suelos
KW  - Tractores
ER  -