Citation
L. H. Wilder. [1910]. “Unsanitary privy, figure for "The Sanitary Privy" by C. W. Stiles (1910), Public Health Reports, volume 25, number 17..” Special Collections, USDA National Agricultural Library. Accessed December 9, 2023, https://www.nal.usda.gov/exhibits/speccoll/items/show/8103.