TY  - BOOK
AU  - DUCKHAM, A. N
TI  - Food production and consumption: the efficiency of human food chains and nutrient cycles
U1  - 641.3 D83F 
PY  - 1976///
PB  - Amsterdam
KW  - NUTRIENT
KW  - AGRICULTURE
KW  - BIOCHEMICAL CYCLES
KW  - BIOENERGETICS
KW  - FOOD CHAINS (ECOLOGY)
KW  - FOOD CONSUMPTION
ER  -