000 00350nam a2200157Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c225
040 _aBED
082 _a301.31 AST V
100 _aASTHANA, VANDANA
_93452
245 0 _aENVIRONMENT
260 _bA.P.H. PUBLICATION
_aNEW DELHI
300 _a188p.
500 _a1233
942 _cBK
999 _c1233
_d1233