This study describing trends in library manpower in all types of Ohio libraries, with emphasis on public libraries, used three research approaches: an assessment of the number of librarians in the state compared to the number of library users, an examination of librarians' salary scales, and a questionnaire sent to all Ohio public libraries. In addition to a recommendation for a centralized data collection agency, a coordinated program for library development is suggested that involves: (1) an increase in the number of professional librarians in all types of libraries, (2) expansion of Ohio library education facilities, (3) integrating Ohio librarianship more fully into national activities, and (4) a re-examination of the organization and administration of libraries and library systems. Methods of increasing the number of librarians and improving library education programs are suggested for school and academic libraries. Recommendations for public libraries involve classification of the goals of public library service, participation in federal programs, a central source for manpower information, continuing education for librarians, and participation in national library events. Appendices include the raw data used in the study, Western Reserve Library School placements for 1958-67, the study questionnaire, and a discussion of the definition of professional librarians. (JB)