This document has been developed as a companion to the NCHEMS Statewide Measures Inventory with the objective of assisting individuals in the identification of available sources of data that can be related to postsecondary education planning and decision making in the United States. It identifies and describes a number of publications, articles, and data bases that contain data related to most of the items of information identified in the NCHEMS Statewide Measures Inventory. This document does not contain the actual data, but it does describe and reference various sources where the data can be found. In addition, it provides information about: (1) how the data are organized (for example, item-by-item, in tables, by chapters); (2) the level of aggregation (for example, data on personal income, number of high school graduates, enrollments in postsecondary education institutions); (3) the level of aggregation (for example, by region, state postsecondary education institution); (4) the years for which data are available; and (5) those measured in the Statewide Inventory that correspond to the data reference. (Author)