000 00319 a2200121 4500
999 _c126775
_d126775
020 _a9788193036129(hb)
082 _a550 SHA/Ear
100 _aSharma, Simran
245 _aEarth and its environment
260 _aDelhi:
_bVibhavari Publication,
_c2015.
300 _av, 232 p.
_c21 cm.
500 _aincludes bibliography.