Khattak,Palwasha Temporal Record Of A Atmospheric Sulphur Dioxide Column Densities Over Pakistan By Using Satellite Observations Palwasha Khattak - Islamabad IESE (SCEE) NUST 2013. - 83 p. HB. - MS Environmental Science . Thesis MS ES Subjects--Topical Terms: Environmental Science LC Class. No.: 363.7 KHA Dewey Class. No.: 363.7 KHA