Since 1969 the National Science Library, National Research Council of Canada, has operated a selective dissemination of information service. It has evolved into a joint SDI program of the National Science Library, National Library of Canada, and the Geological Survey of Canada, which supports 10 bibliographic data bases. (11 references) (Author/DH)

Information Dissemination Centers have emerged as brokers or retailers for computer-based information retrieval services. Areas which concern users and suppliers are the nature of data bases available for search, retrieval results and factors affecting them, timeliness of services, cost and prices, and practical operational considerations related…

Addresses problems confronting documents librarians which result from current federal policies for the publishing of information: the first set includes delay in publication, radically diminished content when a current title is compared to earlier edition, actual cancellation of long-standing titles; the second, increased use of information…