000 00402nam a2200145Ia 4500
008 220718s1969||||xx |||||||||||||| ||und||
082 _a4.10
_bHELM
100 1 _aHelms, L.V
245 1 _aIntroduction to potential theory
_cL.V. Helms
260 _aNew York
_bRobert E. K
_c1969
300 _avi
_e282
490 _aPure & applied mathematics 22
690 _aPotential Theory
942 _cBK
999 _c15411
_d15411