TY  - GEN
AU  - 
AU  - National Technical Information Service
TI  - Bioindicators of pollution: a bibliography with abstracts
CY  - Springfield
PB  - National Technical Information Service
KW  - Bioindicators
KW  - Pollution
N1  - Vol. 2 : Nov. 1977 - Nov. 1979; edited by E.A. Harrison
ER  -