000
00236nam a2200085Ia 4500
008
211203s9999||||xx |||||||||||||| ||und||
100
_a
Sethi, N.K. & Raizada S.B.
_9
6388
245
_a
Textbook of Optics
260
_a
Delhi
_b
Premier Pub Co
_c
1957
999
_c
52610
_d
52610