TY  - BOOK
AU  - D.B. Grigg
TI  - Agricultural systems of the world : An evolutionary approach
SN  - 0521-20269-8
U1  - 630 
PY  - 1974///
CY  - London
PB  - Cambridge University Press
N1  - D.B. Grigg: Agricultural systems of the world : An evolutionary approach.  London.  Cambridge University Press, 1974. 0521-20269-8--(630GRI)
ER  -