000 00317nam a2200121Ia 4500
008 170101s1964 xx 000 0 und d
082 _a515.35 BER
100 _aBerg P W
245 0 _aElementry Partial Differential Equations
260 _aSan Francisco
_bHojden Day Inc.
_c1964
300 _a383 p
942 _2ddc
_cB
999 _c390216
_d390216