00654nam a2200205Ia 4500001000700000003000500007005001700012008004100029010001500070020001500085050001500100082001700115100002400132245007900156260003600235300003000271490004300301504005100344650005300395243150BIBL20160527184615.0780531s1978    nyua     b    00110 eng    a 78003338   a01233575000 aZ699b.H38  a029.7bH434i10aHeaps, H. S.2Local10aInformation retrieval, computational and theoretical aspectscH. S. Heaps.0 aNew YorkbAcademic Pressc1978.  axii, 344 p.bill.c24 cm. 0aLibrary and information science2Local  aIncludes bibliographical references and index. 0aInformation storage and retrieval systems2Local