000 00315nam a2200121Ia 4500
008 220201s1993 xx 000 0 eng d
082 _bReference AM
100 _aReference am Prakash
245 0 _aMan science and environment
260 _bAshish Publishing House
_aNew Delhi
_c1993
300 _a334p.
942 _2ddc
999 _c9162
_d9162