TY  - BOOK
AU  - Pfafflin, J R, Ed.; Ziegler, E N, Ed.
TI  - Encyclopaedia of environmental science and engineering, Vol.2: N to Z
U1  - R  628.03  PFA-E.2 
PY  - 1976///
CY  - Gordon & Breach Science Publishers, New York
KW  - Environmental Science- Encyclopaedia
ER  -