000 00330nam a2200145Ia 4500
008 131111s9999 xx 000 0 und d
100 _aSingh,M.K.
245 _aEnvironmental changes and development
260 _aNew Delhi
260 _bChugh
260 _c1989
300 _a284p.
650 _aEnvironment
763 _a11440
999 _c49256
_d49256