TY  - BOOK
AU  - Morgan Michael D
AU  -  Moran Joseph M
AU  -  Wiersma James H
TI  - Environmental scirnce :  Managing biological  and physical resources.     
U1  - G:55, N3 
PY  - 1993///
CY  - Oxford
PB  - Wm.C.Brown Publishers      
ER  -