The EFO Collector
Auction
Club Business
Honor Roll
Membership
Buyers & Sellers of EFO Material
Papers, Articles
Errors, Freaks and Oddities, by John HotchnerIn this authoritative essay, Hotchner provides a classification of all EFOs, reviews how they occur and how much they might be worth. This article was originally published in 2000 in the Millenium Edition of Linn's World Stamp Almanac, 6th edition.
The AG Files, by Ed Silver
A series of EFO articles published between 1977 and 1983.
Articles by Wayne Youngblood
Exhibits
We will add here EFO related exhibits.WebSites
Interesting EFO Related Sites (Non-Commercial)Interesting EFO Related Sites (Commercial)
Other Interesting Philatelic Sites
