Developed to assist librarians in the measurement and evaluation of the library's ability to provide services, this guide suggests a number of evaluation techniques that may be used once the reasons for a study have been clearly determined and locally peculiar conditions have been taken into account. The first section explains methods for assessing library use, offers procedures for measuring activities that occur in the library including room and equipment use, and outlines techniques for determining in-library circulation and for maintaining library program records. The following section explains several methods for evaluating the library's collection, and the final section introduces the basic concept of sampling as an evaluation tool for library usage and collection study. Two charts summarizing assessment of library use methods and collection evaluation methods are included, along with a table of random numbers and lists of suggested readings for each section. (RAA)