Rudolph Ruzicka plan and vignettes of the Gardens of Dumbarton Oaks, 1935. Dumbarton Oaks Archives, AR.AP.GG.SP.015.
Rudolph Ruzicka plan and vignettes of the Dumbarton Oaks Gardens, 1935. Archives, AR.AP.GG.SP.015, Dumbarton Oaks Research Library and Collection.