TY  - BOOK
AU  - Duckham,A.N.
TI  - Food production and consumption: the efficiency of human food chains and nutrient cycles 
SN  - 0444110429
PY  - 1976///
CY  - Amsterdam
PB  - North-Holland
KW  - Nutrition
KW  - Foodchains (Ecology)
KW  - Biogeochemical cycles
KW  - Agriculture
ER  -