TY  - BOOK
AU  - THOMAS, William A
TI  - Biological indicaters of environmental quality ; a bibliography of abstracts
U1  - 574.5 T36B 
PY  - 1973///
PB  - Ann Arbor,U.S
KW  - INDICATES(BIOLOGY) -- ABSTRACTS
KW  - ECOLOGY -- ABSTRACTS
ER  -