This user's guide to the "Documents on Documents Collection," describes some 387 documents gathered in the 1973-1979 time frame. The collection gathers together documents produced by the various state document distribution centers (usually the state library), for use by administrators of depository programs, state employees, documents librarians, and government planners and researchers. The guide and collection, when used together, are intended to help increase the use of state government publications. The guide has two major sections: the first arranges the items by state and then by category, and the second arranges the same entries first by broad category and then by state. The categories include: (1) bibliographies of bibliographies and reference tools; (2) letters of transmittal and commentaries; (3) depository contracts; (4) forms and form letters; (5) labels; (6) legislation and legal materials; (7) mailing lists, lists of depository libraries, and lists of advisory councils; (8) manuals; (9) procedural guidelines; (10) promotional materials; (11) selection lists and basic or core lists; (12) shipping lists; and (13) studies, surveys, workshops, and miscellaneous. Definitions and cross-references are provided for each category. A history of the collection and an index to the individual authors and distinctive titles complete the guide. (Author/THC)