000			00332nam a2200133Ia 4500
008			230908s9999 xx 000 0 und d
020			_a9788189983017
100			_aGUPTA, U.C.
245		0	_aPARYAVARAN SHIKSHA
260			_bKHEL SAHITYA KENDRA, New DELHI _c2017
300			_a242
650			_aEnvironment Sciences
942			_cBK
999			_c218090 _d218090