00241nam a2200097Ia 4500008004100000041000800041100001400049245003900063260003300102300000800135211209s1979    xx            000 0 und d  aeng  aHEUMANN K  aFUNDAMENTALS OF POWER ELECTRONICS   aBERLINbAGE TELEFUKKENc1979  a242