TY  - BOOK
AU  - Biswas Asit K Ed.
TI  - Ozone layer
T2  - Environmental sciences and applications ,4. United Nations environment programme
SN  - 0 08 022429 6
U1  - U:(G:55), L9 
PY  - 1979///
CY  - Oxford
PB  - Pergamon          
KW  - Geography- Environment
ER  -