Catalogue: Royer, Jennifer, et al. 2020 Thrown, Fired and Glazed: The Redware Tradition from Pennsylvania and Beyond. 184
• Published p. 95Book: Hutchins, Catherine E., et al. 1983 Arts of the Pennsylvania Germans.
• Published: p. 197, fig. 186, possibly Rudolph Graber, Montgomery County PABook: Stoudt, John Joseph. 1966 Pennsylvania German Folk Art.
• Published: p. 318Book: Cooper, Wendy A. 2002 An American Vision: Henry Francis du Pont's Winterthur Museum.
• Published: pp. 134-5, in situ in Fraktur RoomBook: Stoudt, John Joseph. 1966 Pennsylvania German Folk Art.
• "RG 1811" sgraffito dish, said to be HF du Pont's: p. 317, with more crudely executed initials but quite similar vase holding tulips.Catalogue: Pook & Pook Inc., Downingtown PA (sales cat.).
• Similar dish attributed to Gerber in catalogue for the Pioneer Americana Collection of Dr. and Mrs. Donald A. Shelley, April 20-21, 2007, p.179, cat. no. 727