TY  - BOOK
AU  - Thomas, William A. and others,
TI  - Biological Indicators of Environmental Quality
SN  - 0250400227
U1  - 628.53016 
PY  - 1976///
CY  - Michigan, U.S.A.
PB  - Ann Arbor Sci. Pub.
KW  - Biological Indicators
KW  - Environmental Quality
ER  -