TY  - BOOK
AU  - Spedding,Colin Raymond William
TI  - An introduction to agricultural systems
SN  - 085334-823-5
PY  - 1979///
CY  - London
PB  - Applied Science Publishers
KW  - Agricultura
KW  - Biología
KW  - Economía Agricola
KW  - Sistemas Agropascicolas
ER  -