National American Glass Club, Ltd.
Educational organization founded to promote the study and appreciation of all types of glass.
www.glassclub.org
National Cambridge Glass Collectors, Inc.
Founded in 1973 to establish and maintain a permanent museum in for the display, study, and preservation of Cambridge Glass.
www.cambridgeglass.org
Early American Pattern Glass Society
Dedicated to the study, collecting, and promotion of nineteenth century pressed antique glassware.
www.eapgs.org