Sources

I used the following references plus fifty years of personal collecting experience in this effort:

- Imperial Glass by Richard & Wilma Ross, the 1971 pioneering effort.

-  Imperial Glass by Margaret & Douglas Archer, 1978.

-  Volume II of the Imperial Glass Encyclopedia, edited by James Measell, 1997.

- The October 1998 issue of the "Glasszette", a publication of the National Imperial Glass Collector's Society.

-  Glass Threads by the Museum of American Glass, Gay LeCleire Taylor, 2004.

-  Information available at the National Imperial Glass Collector's Society's website