摘要：Subscriptions to the Library of Congress' MARC tapes number approximately sixty. The uses to which the weekly tapes have been put have been minimal in the area of Selective Dissemination of lnformation (SDI) and current awareness. This paper reviews work that has been performed on hatched retrieval/dissemination and provides a description of a highly fl exib le cooperative SDI system develop e d by the Library, University of Saskatchewan, and the National Science Library. The system will permit searching over all subject areas repres e nted by the English language monographic literature on MARC.
