Collection development and management in academic libraries continue to present a considerable challenge, especially in interdisciplinary fields. In order to ascertain patterns of interdisciplinary research, including the patterns of demand for bibliographic resources, this study analyzes the input/output factors that are related to the research activities and subsequent publications of the faculty of the School of Communications, Information and Library Studies (SCILS) at Rutgers University (New Jersey). This school was studied because its mission is explicitly interdisciplinary. A list of the SCILS faculty publications was obtained through the University Computing Center, where the records of the annual survey of faculty activities are kept. The input portion of the study identified the Library of Congress classification numbers of those works that were cited by SCILS faculty who were carrying out research leading to publication. The output portion of the study identified the SCILS faculty publications by their Library of Congress classification numbers. A total of 1,622 titles were analyzed. Analyses of the data indicate that approximately 46% of the intellectual endeavor of the SCILS faculty falls outside of their own disciplinary areas. In addition to being consumers of materials from other fields, the faculty are also producers in those fields. It is imperative that selection librarians understand the fluidity of current research activities and the extent of interdisciplinary demands that are being placed upon research collections. (Author/SD)