The May-June, 1975, issue of Wisconsin Library Bulletin contains articles about library cooperative programs and networks. Subjects covered include: library network planning and definitions of terms; views on the National Commission on Libraries and Information Science program by school, public, academic, and state librarians; the Midwest Library Network; school/public library access and cooperation; the American Association of School Librarians Committee on Networking discussion of networking and the schools; concept indexing; a tape cooperative; services of the state library; Wisconsin Valley intertype library cooperation; automated circulation in the Milwaukee County system; a business information service at Milwaukee Public Library; and the use of the Ohio College Library Center's cataloging at University of Wisconsin, Green Bay. Other articles cover the public service policy at University of Wisconsin at Parkside, and the changing roles of Wisconsin public libraries. (LS)