TY  - BOOK
AU  - Duckham,Alec Narraway
AU  - Masefield,G.B.
TI  - Farming systems of the world
SN  - 0701113618 :
U1  - 630 
PY  - 1970///
CY  - London
PB  - Chatto & Windus
KW  - Agricultural systems
ER  -