One hundred western libraries were surveyed to determine the present costs of library operations which potentially could be affected by the use of network bibliographic services. Results of this project--a survey of 76 libraries and in-depth case studies of 12 additional libraries--are reported in tabular format. Tables are included on holdings distribution; staffing; processing and reference support; computer support; equipment and communications costs; budget and expenditures; regional library summaries; acquisition and cataloging departments budgeting, staffing, and processing patterns; interlibrary loan budget, staffing, and borrowing requests; institutions queried; time; verification policies; frequency of borrowing and lending; locations of borrowing and lending; characteristics of filled borrowing and lending requests; and administration budget and staffing. (KP)