Reports results of survey investigating aspects of weeding of materials in reference collections at 377 U.S. colleges and universities: existence of written policy or unwritten weeding practice; extent of weeding; frequency; what happens to discards; effect of shelf space, staff time, and use of materials on weeding decisions. (5 references) (EJS)

Argues that a mix of quantitative and qualitative measures is most efficacious in library collection analysis. Cases drawn from the literature in which a combination of these measures was profitably applied are considered, and the types of software packages for purposes of data manipulation are discussed. (Contains 15 references.) (KRN)