QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 77.10 September 13, 1977 QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 77.10 Subject: PUBLICATIONS: "Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples" edited by P. E. Greeson, T. A. Ehlke, G. A. Irwin, B. W. Lium, and K. V. Slack (Techniques of Water-Resources Investigations, Book 5, Chapter A4, 332 p., 1977) . I am pleased to announce the availability of the subject manual, which was compiled and edited by the Task Group on Biology and Microbiology using the input of many biologists and microbiologists in the Water Resources Division. The manual supersedes the biological TWRI that was prepared in 1973. It contains detailed descriptions of methods used by the Geological Survey for collection and analysis of aquatic biological and microbiological samples. Part 1 discusses biological sampling and sampling statistics; part 2 contains detailed descriptions of more than 45 individual methods; part 3 consists of a glossary; and part 4 is a list of taxonomic references. This is the second water-quality TWRI that has been published as a loose-leaf manual. The format is designed to permit flexibility in revision and publication on the basis of need. Periodic supplements will be prepared as frequently as every 6 months and distributed to all purchasers of the manual or persons on the WRD distribution list to receive the manual. Reprinting of the manual will be undertaken at intervals of about three years. Copies of the TWRI are being distributed to all district offices, subdistrict offices, field headquarters, and water-quality laboratories of the Water Resources Division. Additional copies that are needed to support WRD programs can be obtained by written request to the Chief, Publications Unit (Mail Stop 435, Reston, Virginia 22092). Requests should include the names and addresses of individuals that will receive copies of the manual so that they will be assured of receiving all supplements. In general, distribution of free copies outside WRD should be limited to Federal, State, or local cooperators in order to support WRD's assurance to GPO that a minimum of 300 copies of each loose-leaf manual will be sold. Loose-leaf manuals will not be available from sources other than the Publications Unit or the Government Printing Office. Questions or comments pertaining to the manual should be directed to the Chief, Quality of Water Branch (MS 412, Reston, Virginia 22092). R. J. Pickering Chief, Quality of Water Branch WRD Distribution, A,B,S,FO,PO