- Chautauqua County Government
- Chautauqua County Visitors Bureau
- Harmony Historical Society
- Town of Harmony
- Town of North Harmony
- Panama Central School
- Books Series In Order– list the series of every book in order.
- BookSeries.org – provide full and comprehensive listings of every single author there is and every series they have ever wrote both in publication order and chronological order.
- CREDO Reference
- lendedu [Student Load Consolidation]
- Reference USA
- Worldcat.org [library catalogs]