(A) Textbook of environmental studies/ D. K. Asthana and Meera Asthana. by
Edition: 2nd. ed.
Material type: 
Computer file; Format:
electronic
Language: English
Publication details: New Delhi : S. Chand, 2012
Availability: Items available for loan: SSC Central Library (5)Call number: 574.5 AST-ENV, ... Not available: SSC Central Library: Checked out (1).
