000
00311nam a2200121Ia 4500
008
190216s9999||||xx |||||||||||||| ||und||
100
_a
Subash Chandra Rastogi
245
0
_a
Periodic Classicfication Of Elements
260
_b
Pragathi Prakashan
300
_a
308p
650
_a
Chemistry-Chemistry
942
_c
BK
999
_c
2247
_d
2247