Current data on the officers, trustees, and member institutions of the Reference and Research Library Resources (3R's) systems in New York State are provided in this directory. Institutional data contain the names and addresses of member institutions, the name of the librarian or library director, the library's telephone number, and teletype number. The name of the director, the address, and the telephone number of each system are also listed. As of June 30, 1972, there were 386 members of the Reference and Research Library Resources Systems. Of the total membership, 181 are libraries of institutions of higher education. In addition to college and university libraries, the 3Rs systems' membership includes all types of libraries - public libraries, historical societies, hospitals, and special libraries of government, business, industry, and research institutes united in a statewide network which connects research library users to research resources. The spiraling costs of and mounting pressures for research library and informational resources make interlibrary cooperation through network sharing not only an opportunity for greatly improved library service, but more importantly, it is of paramount importance to ensure the availability of research materials for all advanced library users in the State. (Author/NH)