A year-long study involving 29 libraries (11 public, 5 academic, 1 combined academic/public, 6 special, 1 combined public/school, and 5 school) was undertaken in FY 1984 to monitor the usage of an existing union catalog--the Washington Library Network Resource Directory--and determine what policies and protocols should be considered when preparing for usage of a statewide union catalog by Montana libraries. Of particular interest were the effects of a switch from the predominantly hierarchical approach of interlibrary loans (ILL) to direct access. The Washington Library Network Resource Directory (RD) which was used as a precursor to a Montana union catalog, Moncat, is a computer-generated microfiche catalog of the holdings records of participants in the Washington Library Network, including Montana libraries. This final report presents project findings in multiple areas including: general usage of the resource directory, ILL volume and workload, turnaround time, routing-in sequence and load leveling, lenders' responses to the Pilot Moncat Project, and ILL protocols and procedures. Recommendations are made in the following areas: training, building the union catalog, the first Moncat, related technology, protocols, network development, public awareness, considerations for the future, and summary of major findings and recommendations. Numerous tables and appendices supply supporting information. (THC)