The eight data maps present comparative data on: (1) assault classification subgroups; (2) race classification subgroups; (3) burglary classification subgroups; (4) robbery classification subgroups; (5) parole classification subgroups; (6) intelligence classification subgroups; (7) violence classification subgroups and (8) alcohol and drug classification subgroups. The manual offers instructions on how to read the maps and reproduces the introduction of the major study report itself. Over 70 references are provided. For the major study report, see NCJRS 75654.