000
00252 a2200097 4500
001
18504
100
_a
Tychnor & samarehi
245
_a
Partial differential equation of mathematical physics
260
_a
_b
Holden day iuc
_c
1964
090
_c
13740
_d
13740
942
_a
NUST-CAE
_c
M
_c
4159
999
_c
253577
_d
253577