The purpose of the study was to (1) pinpoint the role which Pacific Northwest Bibliographic Center (PNBC) might play for Washington in the development of the Washington State Library Network; and (2) ascertain what effect the development of the Washington State Library Network might have on PNBC. Methodology for the study involved: (1) a literature review; (2) interviews with staff members at PNCB, University of Washington Library, Health Science Library, Washington State Library and Seattle Public Library as well as conversations with librarians familiar with PNBC and other agents for interlibrary loan; (3) consultation with research, automation and management experts; (4) questionnaires sent to libraries and state agencies; (5) examination of the bibliographic elements of state-wide reference service; (6) observation of procedures at PNBC and the Public Services division of the Washington State Library; and (7) analyses of requests coming into PNBC and the Washington State Library. Part I of the report analyzes and makes recommendations for PNBC, and Part II analyzes and makes conclusions on interlibrary loan practices among the libraries of the Pacific Northwest. The PNBC manual for participating libraries and Washington State Library's Interlibrary Loan Manual are included in this report. (Author/JB)