California Society of Printmakers, www.caprintmakers.org
American Print Alliance, www.printalliance.org
World Printmakers, www.worldprintmakers.com
Art on Paper, www.artonpaper.com
MOMA New York, www.moma.org/whatisaprint
International Print Center, www.ipcny.org
Photogravure Process, www.curtis-collection.com/process.html
Society of American Graphic Artists, saga.monmouth.edu
Center for the Study of Political Graphics, www.politicalgraphics.org
Printmakers Resource, www.printmakers.info
Interesting printmaking miscellany, www.printeresting.org
Art of the Photogravure, www.photogravure.com

David Morrish & Marlene MacCallum.  Copper Plate Photogravure:  Demystifying The Process. Focal Press, 2003

William Crawford. The Keepers of the Light:  A History and Working Guide to Early Photographic Processes.  Dobbs Ferry, NY.  Morgan & Morgan, 1979

Gary P. Kolb.  Photogravure, a Process Handbook.  Carbondale and Edwardsville.  Southern Illinois University Press, 1986

Deli Sacilotto.  Photographic Printmaking Techniques.  New York.  Watson Guptill Publications, 1982

Magical Secrets Series.  Crown Point Press, www.crownpoint.com