One of a series of instructional booklets designed to introduce adult education program planners to the basic concepts integral to and alternative strategies for conducting needs assessments, this instructional booklet deals with determining where to find information for use in conducting needs assessments. Described first is the relationship of the process of determining where information can be found to the entire needs assessment process. Next concepts and processes are set forth for locating representative authority groups from institutions and associations as well as independent individual authorities. Following a discussion of the concept of target population, basic steps are provided for identifying and describing a representative sample of the target population for a needs assessment. Examined next are the basic types of printed information as well as their accessibility in relation to given needs assessment undertakings. (MN)