Although the focus is international there is much of interest for the student of American history. Excellent annotations supplement the 685 entries. A Guide to Manuscripts and Archival Materials in the United States . G.K. Hall, 1981. Comprehensive guide to original source materials in all types of libraries and historical societies.
Entries describe the holdings for each institution.
For the advanced scholar. Smithsonian Institution Press, 1977. Annotated lists of various libraries, archives and collection, research centers, etc. For the advanced scholar. The Researcher's Guide to American Genealogy .