[Collaborative problems, (Rome, Italy). A permanent monument to mechanical progress, ground plan, 1930. M. Rapuano, landscape architect; B.K. Johnson, architect; D.M. Mattison, painter; G.H. Snowden, sculptor], 1910-1940

[Collaborative problems, (Rome, Italy). A permanent monument to mechanical progress, ground plan, 1930. M. Rapuano, landscape architect; B.K. Johnson, architect; D.M. Mattison, painter; G.H. Snowden, sculptor], 1910-1940. Lantern Slides Collection, 1910 - 1940, PA.AAR.LSC. Photograph Archive of the American Academy in Rome.

[Collaborative problems, (Rome, Italy). A permanent monument to mechanical progress, ground plan, 1930. M. Rapuano, landscape architect; B.K. Johnson, architect; D.M. Mattison, painter; G.H. Snowden, sculptor], 1910-1940. Lantern Slides Collection, 1910 - 1940, PA.AAR.LSC. Photograph Archive of the American Academy in Rome. http://localhost:8081/repositories/5/archival_objects/94382 Accessed February 03, 2026.