The EFO Collector
Club Business
Resources
Honor Roll
Membership
Buyers & Sellers of EFO Material
American Philatelist: Issue of November 2008, page 1018
Keywords: stamp errors, stamp errors, EFO, Youngblood, die-to-plate process, Transportation coil efinitive series, Encyclopedia of Plate Varieties on U.S. Bureau-Printed Postage Stamps, Cloudy French, 1979, Bureau Issues Association, United States Stamp Society, plate cracks