000
00279nam a2200121Ia 4500
020
_a
8170416329
041
_a
eng
082
_a
507
_b
JOS/TEA
100
_a
Yadav, M. S.
_9
1136066
245
_a
Teaching of Science
260
_a
New Delhi
_b
Anmol Publication
_c
1992
942
_c
BB
999
_c
400763
_d
400763