00432nam a22001457a 4500 20260311142119.0 9789386478276 23 371.26 SEN Sengar, RS and Kumar, Amit 11634 Environment Science : Question Bank / RS Sengar and Amit Kumar New Delhi : CBS Publishers & Distributors , 2017 . 639p Kumar , Amit 11635 ddc BK 757495 757495 0 0 ddc 0 0 ES ES 2026-03-11 0 371.26 SEN ES2578 2026-03-11 08:52:18 2026-03-11 REF