TY  - BOOK
AU  - UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE
ED  - UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE
TI  - Hemispheric transport of air pollution
T2  - "Air Pollution Studies No. 17, 18, 19, 20"
SN  - 9789211170436
U1  - "X4:(G:55), Q0/UN" 
CY  - New
PB  - York United Nations     
ER  -