Iowa Usonian Houses by Frank Lloyd Wright, 1945-1960, MPS (NRIS 64500164)

• Alsop, Carroll, House (Oskaloosa)
• Grant, Douglas and Charlotte, House (Marion)
• Lamberson, Jack, House (Oskaloosa)
• Sunday, Robert H., House (Marshalltown)
• Trier, Paul J. and Ida, House (Johnston)

National Park Service documentation: https://npgallery.nps.gov/AssetDetail/NRIS/64500164