000 00294nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aRamesh ghanta and Bhaskara rao Digumarti
245 0 _aEnvironemtal education
260 _bDisvery pub
260 _c1998
365 _b525
942 _cBK
999 _c221518
_d221518