Materials in this collection were submitted by respondents to a survey which sought specific data on the numbers and types of approval plans in Association of Research Libraries (ARL) libraries, whether such plans are meeting expectations, their relative importance in the library, who makes the key decisions, and the kind of thought and study that preceded adoption, rejection, or alteration of an approval plan. Included are a copy of the survey questionnaire with a tally of responses from 101 libraries; a list of vendors that sell materials to libraries on an approval basis; questions and statements of criteria for evaluating vendors of approval plans from the University of Cincinnati, Brown University, and Stanford University; analyses, studies, and statistics on approval plans proposed or in use at Brown University, Texas A & M University, the University of Texas at Austin, Temple University, the University of Michigan, Michigan State, and Stanford University; and general comments, program descriptions, and guidelines relating to approval plans from the University of Toronto, Dartmouth College, the University of Virginia, Queens University, Florida State University, the University of Miami, the University of Michigan, Northwestern University, Ohio State, and the University of North Carolina. (JL)