TY  - GEN
AU  - Enger,Eldon D.
TI  - Environmental science: the study of interrelationships 
SN  - 069705134X
PY  - 1989///
CY  - Dubuque, Iowa
PB  - W.C. Brown
KW  - Ecology
N1  - Recommended text : *SL151/ SL152 (Surveying & Land Studies)
ER  -