This bibliography describes, in comprehensive detail, thirty-six special collections in the United States that are rich in published and unpublished research materials in the fields of intentional communities (communes), nudism, and sexual behavior, especially sexual freedom. For each collection, Selth provides information about types of publications, bibliographic access, conditions of use, miscellaneous comments, and describes the holdings. Indexes by name of the collection and geographical location and indexes of periodicals, names, and subjects are provided to enhance the usefulness of this unique research aid.