Emmanuel Leutze, 1816-1868: Freedom is the Only King by Barbara S. Groseclose for the National Collection of Fine Arts (Smithsonian), 1975

Emmanuel Leutze, 1816-1868: Freedom is the Only King by Barbara S. Groseclose for the National Collection of Fine Arts (Smithsonian), 1975, Box: 45, Folder: 8. Richard P. Wunder Research Files, MS.002. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/15862 Accessed June 25, 2025.