TY  - BOOK
AU  - Laycock,George
TI  - Air pollution
SN  - 0-448-21440-7
U1  - 363.739 L427 1972 
PY  - 1972///
CY  - New York
PB  - Grosset & Dunlap, Inc.
KW  - Air pollution
N1  - Includes index
ER  -