000
00280nam a2200121Ia 4500
008
200906s9999 xx 000 0 und d
082
_a
517.383 D855
100
_a
DUFF.G.F.D
245
0
_a
PARTIAL DIFFERENTIAL EQUATIONS
260
_b
O.U.P
_c
1956
300
_a
23X15
942
_c
BK
999
_c
61932
_d
61932