00255nam a2200109Ia 4500008004100000041000800041082002400049100001000073245002900083260002500112300000800137211209s1972    xx            000 0 und d  aeng  a621.313 N72 BAI/PAL  aBAINS  aPOWER SYSTEM PROTECTION   bORIENT-LONGMANc1972  a518