This cumulation provides access to historical statistics of research libraries in the United States and Canada, not including non-university members of the Association of Research Libraries (ARL). The publication has been produced from a computerized data file and incorporates corrections to the annual editions of ARL statistics. An explanatory introduction precedes an alphabetical list of institutions included, with notations of institution, type, and region codes and year of joining ARL. Annual data are then presented for: (1) library collections in terms of total volumes, volumes added in the current year, total microforms, and current serials; (2) interlibrary loans including originals and photocopies borrowed and loaned; (3) expenditures for library materials, current serials, binding, total salaries, and other operating costs; (4) library personnel recorded by number of professional, non-professional, and student assistant staff, and beginning and median professional salaries; and (5) university statistics comprising total enrollment, graduate enrollment, Ph.D.'s awarded, a Ph.D. field code indicating number of subject fields in which Ph.D.'s were awarded, and amounts of federal support and total university expenditure. Figures are not available for all research libraries in each of the categories of data. Cautions relating to the use of ARL statistics are provided. (ESR)