Published in Mt. Washington and Pairpoint glass, v. 2, by Kenneth M. Wilson, Jane Shadel Spillman and Kirk Nelson: 88066, p. 177 NK5112.9.M9 .W74.
Published in "Exploring Ephemera in The Rakow Research Library", by Gail Bardhan and Rebecca Hopman, within Hobstar, v. 37, no. 6 (Mar. 2015): AI99578, p. 6332 (bottom) PER NK5112 .H68.