00313nam a2200097Ia 4500008004100000040003800041100002000079245006500099260003400164300001700198211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aStakgolod, Ivar 0aBoundary value problems of mathematical physics: vol 1 and 2  bMac millan coaNew Yorkc1968  aviii,408p p.