- Danish State Archives
- Danish West Indies Society
- Department of Geosciences University of Missouri-Kansas City
- Friends of Virgin Islands National Park
- “Geographic Dictionary of the Virgin Islands”by James William McGuire (published 1925)
- Geology of St. John, U.S. Virgin Islands
- Hugo Larsen
- Library of Congress
- Montserrat Volcano Observatory
- Profiles of Famous Virgin Islanders
- St. Croix Landmarks Society
- St. Thomas Historical Trust
- The National Archives (Great Britain)
- Virgin Islands Archeology with the NPS and Friends
- VI Danish Consul
- VI State Historic Preservation Office
- Virtual Preservation of Colonial Structures
- Danish National Archive on VI History
- Emory University’s Trans-Atlantic Slave Trade Database
