This self-study--part of a series of studies conducted at Michigan State University Libraries--was designed to elicit information regarding non-use of the library by members of the academic community. A telephone survey questionnaire was administered to a stratified systematic sample of students and faculty members, and 1,269 students and 211 faculty members were interviewed. Frequent users among the students differed significantly from infrequent users in several ways: frequent users were more likely to be expected to write term papers and short papers, while infrequent users were more likely to report that library use was irrelevant to their coursework, there were too many demands on their time, the library was too complex, or its location was inconvenient. The chief difference between frequent and infrequent users among the faculty was the perception of need. Infrequent users were more likely to report they had no need to use the library. The importance of the library as an information source was rated very or extremely high by 97% of the faculty and 84% of the students. The questionnaires and their results are appended. (Author/THC)