Aerogramme Society
L' Association des Collectionneurs d' Entiers Postaux
Postal Stationery Society of Australia
Berliner Ganzsachen-Sammler-Verein von 1901, Tyskland
British North America Philatelic Society - Postal Stationery Study Group
FIP Postal Stationery Commission
Nederlandse Vereniging van Poststukken- en Poststempelverzamelaars, Holland
The Postal Stationery Society
Postal Stationery Society of Australia, Australien
Schweizerischer Ganzsachen-Sammler-Verein, Schweiz
Societe Belge de l'Entier Postal, Belgien
United Postal Stationery Society
 

Arctic and antarctic postal stationery
Australia, Stephen D. Schumann
Bahamas Postal Stationery, Peter J. Roberts
Belgium Postal Stationery, Ludo Thomassetti
Belgium Wrappers  
Bermuda Wrappers
Botswana Postal Stationery, John Inglefield-Watson
Britain, Howard Summer  
Bulgaria
Canada Wrappers
Comoro Islands Postal Stationery
Chile Postal Stationery 
Chile: 10 or less, Ross A. Towle
China Postal Stationery, Tommy Chiu
Denmark - Bicoloured Postal Stationery, Lars Engelbrecht
Denmark - Weaponstype Postal Stationery, Andreas Kessler
Danish West Indies - Envelopes: Double watermarks
Dubai Postal Stationery
Estonia Postal Stationery
Estonia Postal Stationery
Estonia - Provisional Postal Stationery 1991-1993, Bert Hoflund
Ethiopia
Finland, Morten Naarstad
France Postal Stationery
France - The Postal Stationery of the Pneumatic Post of Paris, J. D. Hayhurst
France - Postal Stationery in French Colonies
France Postal Stationery, Bertrand Sinais
France Postal Stationery
France - Military postal cards, Bône Stéphane
France - Postal Stationery: 1 Fr 50 Brun type Pétain
France Postal Stationery
Germany Postal Stationery, Michael Witte
Germany Postal Stationery, Thomas Fedder
Great Britain - Development of the Post Card, Michael G. Pitt-Payne
Hawaii Postal Stationery  
Hawaii Postal Card and Stationery
India - Postal Stationery Errors, R. Howard Courtney
India Postal Stationery, Prashant H. Pandya
International reply cards, Bjørn Myhre 
Jamaica: The George VI Post Cards of Jamaica
Luxemburg Postal Stationery, Gary Little
New Zealand Postal cards 
North Korea - Catalogue of Postal Stationery 1947-1961, Greg Todd
Philipines Postal Stationery  
Portugal Postal Stationery
Portugal, Hernâni Matos
Reply Coupons, André Hurtré
Romania, Free Military Postal Stationery (1941-1945)
Russia/USSR Postal Stationery
Russia Postal Stationery
Russia Topical Postal Stationery  
Shanghai Postal Stationery  
Spain, Francisco Manuel Querol Piñón
South African Homelands
South Africa - Orange Free States  
Sovjet Union (Former)
Ukraine Postal Stationery
Ukraine Postal Stationery
United Arab Emirates
US Postal Stationery, Henry Stevens
US Postal Stationery - the U275 story  
US Postal Stationery - The 7 Cent Vermillion Stanton Envelopes  
US Postal Stationery, James Majka
US Postal Cards, Martin Peterson
US Postal Cards, Donna Albino
US Postal Cards, John H. Beachboard
US Postal Cards
US Postal Cards
US Official Stamped Envelopes, Dennis W. Schmidt
US Precancelled Envelopes I  
US Precancelled Envelopes II  
US Air Mail Postal Cards
US/Mexico Postal Stationery, Steven Whitcombe
Yemen Postal Stationery

Chess on Postal Stationery
Gandhi on Postal Stationery
Geographics on USSR Postal Stationery
Petroleum on Postal Stationery
Railway on Postal Stationery
Scouts on Postal Stationery
Scouts on Postal Stationery
Ships on Postal Stationery
Stamps on Postal Stationery
Romanov on Postal Stationery

Mike Sagar, Canada 
Terraphila, Peter Steinkamp, Germany
Austrian Consult, Friedrich Zettl, Austia (China, Japan etc.)
Baxley Stamps
Brookman Stamps
Celmark Corp
Collect.at
Ed´s
First Day Cover
Fyns Frimærke Service, Denmark
Georg Hammrich
HB Collectibles - US Postal Stationery
Edward Hines
Judnick
Lingens
Loral Stamps
Namib Stamps
RAP
Régis Patinet
Robin Linke
Skilling, Jan Bendix, Denmark
Stamp Land, Slovenia
Ronald J. Tamburello
Wang´s Stamps
ZOF

 

LITTERATUR

PB Books
Hungary
Indonesia
James Lee
Book Review:  Norway Postal Stationery Catalog 1872-1992
Postalhistory.org
Thematic
The Collectors' Guide to Postal Stationery
The Postal Stationery of Burma and Myanmar
The Higgins & Gage catalogue
The use of Postal Stationeries and relatives in thematic philately

 

AUKTIONER

Ebay
Milan Cernik
Playle

 

UDSTILLING

FIP - Specialregulations (PDF) - in english
FIP - Specialregulations (Word) - in danish
FIP - Guidelines (Word) - in danish
Morten Lintrup - Staap albumprogram
NAPE - About mounting

Denmark - Bicoloured issues, Lars Engelbrecht

Hvis du vil foreslå et link til en hjemmeside om helsager, er du meget velkommen til at maile mig: lars.engelbrecht@helsager.dk 

Hvis du vil i kontakt med andre helsagssamlere, kan det anbefales at søge på The Stamp Trader List.