Bibliographies list selected sources on a topic. Be aware of the dates of coverage. Good sources for starting research. Keep in mind there are many, many more bibliographies available; this is only a sample list.
American and Canadian Immigrant and Ethnic Folklore: An Annotated Bibliography
GR 105 .G43 1982 West Stacks
A bibliography to scholarship on European and Asian immigrant folklore in America and
Canada. Organization is by nationality, but includes topic and geography index.
American Folklore: A Bibliography, 1950-1974
GR 105 .F55 1977 West Stacks
A selective bibliography and guide to the literature of folklore between 1950 and 1974.
Native American Folklore, 1879-1979: An Annotated Bibliography
E 98 .F6 C575x West Stacks
An annotated bibliography of books and articles organized by region and tribes. Includes author and subject indexes.