000
00245nam a2200109Ia 4500
008
220201s1992 xx 000 0 eng d
100
_a
GUPTA S L
245
0
_a
IIT PHYSICS
260
_a
DELHI
_b
JAI PRAKASHAN
_c
1992
300
_a
670
942
_2
ddc
999
_c
91093
_d
91093