Book: Lee, Ruth Webb & Rose, James H. 1948 American Glass Cup Plates. 445.
• Cup plate pattern listed: No. 440-B, pl. 77, p. 268, Probably SandwichBook: Spillman, Jane Shadel. 1981 American and European Pressed Glass in The Corning Museum of Glass.
• Medium blue and colorless cup plates pressed in same pattern: nos 409, 410, p. 130Book: Barlow, Raymond E. & Kaiser, Joan E. 1993 A Guide To Sandwich Glass: Blown Tableware, Pressed Cup Plates and Salts from Volume 1.
• Medium blue matching "Valentine" cup plate: no. 1397