000 00334nam a2200133Ia 4500
008 221001s1990 xx 000 0 eng d
082 _a551.4 SIN (H)
100 _aSingh, Savindra
245 0 _aBhu-aakriti vigyan
250 _a5th ed.
260 _aGorakhpur
_bVasundhra Prakashan
_c1990
300 _aviii, 712p.
942 _2ddc
_cBK
999 _c20292
_d20292