00641nam a22001817a 450000500170000001000140001702000260003103500130005703700130007008200080008310000160009124501850010726000390029227000700033130000220040165000210042370000150044420100804104249.0  aENG-98010  a9788178129082c160.00  aEN-81543  bDBAD/PUB  a000  aGupta's, R.  aObjective environmental sciences :ba comprehensive book for UGC/ICAR-NET,UPSC, PCS, banking, CPCB and other recruitment and entrance examinations /cby R. Gupta's [and] B.B. Singh  aNew DelhibRamesh Publishing House  a12-H, New Daryaganj Road, Opp. Traffic KotwalibNew Delhie110002  a296p.c24 cm(pbk)  aCompetetive exam  aB.B. Singh