Book: Johnson, E. Polk. 1912 A History of Kentucky and Kentuckians. 3.
• Discussion of George C. Wallace, pp.1291-1292Catalogue: Brunk Auctions (auction catalogue).
• Similar jug: May 30, 2009, lot 282, p. 80 of the "Best of Georgia: The Florence and William Griffen Collection" sale.Catalogue: Crocker Farm, Inc. Crocker Farm Auction Catalogue.
• Similar form jug sold at auction: November 3, 2013, lot 345, similar form, incised script "Compliments/ of/ Jos L Friedman & Co/ Pure Vinegars/ Paducah Ky" c. 1880.Book: 1903 Annual Report of the North Dakota Agricultural Experiment Station.
• Reference to name "Wallace & Gregory": p. 198.