The third of four volumes in a series describing the basic documentation practices involved in the initial setting up and subsequent operation of an information-library organization to provide defense-aerospace scientific and technical information services, this manual consists of three sections. "Information Retrieval," by Tom Norton, provides a brief overview of the development of information retrieval (IR) and a model of an IR system. Topics discussed include conventional indexing and postcoordinate indexing systems; problems of vocabulary control, thesaurus construction and presentation; the use of computers to produce indexes (KWIC, KWOC, and SLIC); and the features of computerized "dial up" online information systems. In "Dissemination Practices," Fred Dyer presents an overview of the dissemination of information to the scientific user community, and discusses initial and secondary distribution and the need for automated support of the processes. Appendices provide the results of a survey of national and international technical information centers, which detail charters, databases, practices, and operations. "Microform Systems and Reprography," by Peter Rolls, covers the preparation and reproduction of research and development publications, including technical details of reprographic and microfilm processes, equipment and staff, costs, computer output on microfilm (COM), and practical aspects of quality control for publications in both paper and microfilm formats. (RAA)