00326nam a2200121Ia 450000500170000000800410001702000150005805000170007310000180009024500480010826000320015665000160018820251229085016.0251229s9999    xx            000 0 und d  a0121186504  aZ 695.9 .B6   aBorko, Harold 0aIndexing concepts and methodscHarold Borko  aNew b Academic Pressc1978  aAbstracting