Part of the Frick Collection Archives Repository
Graf, Ursus the Elder - Man and Compass (drawing), Box: 3, Folder: 33. Schaeffer Galleries Records, MS.016. Frick Collection Archives.
Graf, Ursus the Elder - Man and Compass (drawing), Box: 3, Folder: 33. Schaeffer Galleries Records, MS.016. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/18315 Accessed January 22, 2025.
