TY  - BOOK
AU  - D . B.Grigg
AU  - The Agricultureal  System of the World: An Evolutionary Approach
TI  - The Agricultureal  System of the World: An Evolutionary Approach
SN  - 0 521 09843 2
PY  - 1974///
CY  - London
PB  - Cambridge University Press 
N1  - include, Appendix, Bibliography, Index, Notes
ER  -