TY  - BOOK
AU  - Laura E. Powers
AU  -  Robert McSorley, 
TI  - Ecological Principles of Agriculture
SN  - 0-7668-0653-7
U1  - 630.2 
PY  - 2000///
CY  - Africa
PB  - Delmar Thomson Learning
N1  - Laura E. Powers & Robert McSorley: Ecological Principles of Agriculture.  Africa.  Delmar Thomson Learning, 2000. 0-7668-0653-7--(630.2POW)
ER  -