This report contains the results of a study to design a communications network to facilitate interloan procedures in the three public library systems of New York City--the Brooklyn Public Library, Queens Borough Public Library, and New York Public Library. Methods employed for the study include interviews with appropriate library personnel, analysis of relevant system data, and review of alternative communications equipment for the interloan network. Recommendations are that: (1) each of the libraries with special interbranch loan collections should install telex equipment, (2) the three libraries should not install data communications equipment in the agencies and collections of their systems at this time, (3) the three libraries should interconnect their central interbranch loan units with telex equipment and establish a cooperative intersystem loan procedure, (4) a pilot project to test intersystem borrowing should be conducted, and (5) requests for holdings information should be serviced by providing the patron with the union catalog telephone number. Appendixes present extensive data on current interloan procedures in each of the library systems and the potential for intersystem loan. (JB)