00275nam a2200121Ia 4500082002000000100001700020245002300037260003400060300001000094490003900104500000500143700000500148  a515.78bW489.PT  aWermer, John  aPotential theoryb  aBerlinbSpringer-Verlagc1974  a146p.  aLecture notes in Mathematicsv 408  a  a