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1.
Air pollution / A K Tripathi. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Original language: English
Publication details: New Delhi : Ashish, 1993
Availability: Items available for loan: National Library of Bangladesh (1)Call number: 363.7392 TRI 1993.

2.
Water pollution / A.K. Tripathi and S.N. Pandey. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Original language: English
Publication details: New Delhi : Ashish Pub. House, 1990
Availability: Items available for loan: National Library of Bangladesh (1)Call number: 589.35222 TRI 1990..

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