00470nam a2200145Ia 4500003000900000008004100009040001600050080001600066100002300082245010200105260003500207300001400242490003300256650003500289IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a517.95bSOM  aSommerfeld, Arnold 0aPartial differential equations in physicscArnold Sommerfeld                                       aNew YorkbAcademic Pressc1949  axi, 335p.  aPure and applied mathematics  aPartial differential equations