000
00267nam a2200109Ia 4500
008
230210s9999 xx 000 0 und d
100
_a
Maheshwari, V.K.
_9
19019
245
0
_a
Teaching of Science
260
_b
Surya Publication
_c
2010
300
_a
363
942
_c
BK
999
_c
118537
_d
118537