000
00238 a2200121 4500
080
_a
541.64(063)
_b
N 277 H
245
1
_a
High polymers
260
_a
Poona
_c
1957
650
_a
Polymers
100
_a
_d
300
_a
32 p.
901
_a
53327
999
_c
26431
_d
26431