A seminar held in October 1978 brought together teams from public and school libraries in 36 Illinois communities representing the 18 Illinois library systems, in order to: (1) provide an environment where school and public librarians who work with young adults could identify their problems, assess their needs, and begin working toward mutual solutions; (2) introduce librarians to experts in the fields of adolescent psychology and services to young adults; (3) develop a specific project which would initiate cooperation between school and public librarians; (4) provide ongoing cooperation in the same community; and (5) provide seminar participants with the expertise necessary to develop and present training on the system level. This final report presents 34 project evaluations which describe the cooperative programs developed as a result of the seminar. Each evaluation indicates the process used for initiating the project, youth participation in project implementation, obstacles encountered, and project results. Appendices comprise a copy of the proposal for a Library Services and Construction Act (LSCA) Title III grant, which was used to fund the seminar, and a list of seminar participants with their affiliations and addresses. (ESR)