Links to websites about perfins

General Wikipedia Nederland
Wikipedia Duitsland  
Wikipedia Engeland/UK
The Postage Stamp Chat Board & Stamp Forum
Perfinworld Community of Collectors
Australia Perfin Stamps of Australia
Belgium Philippe Vanhuffel over perfins in de ‘grote Montenez’-zegels
Canada British North America Philatelic Society (BNAPS)
Tony Brown over Canadian Perfin Officials
Internet Archive Wayback Machine
Cuba Robert Littrell over de perfins van Cuba
Danmark Jan Langenberg over Deense perfins
Jan Kronak, maker van de Deense perfincatalogus, over Deense perfins
Germany Arge Lochungen over Duitse perfins
England/UK The Perfin Society (UK)
France Philatelie Collections over de Franse perfincatalogus van Ancoper
Hungary Magyar Perfin Klub
Hong Kong Rod Sell van de Philatelic Study Group over de perfins van Hong Kong
Italy Perfin.it over Italiaanse perfins
Japan The Stamp Forum over Japanse perfins
Netherlands Haarlemse Filatelistische vereniging ‘Op hoop van zegels
Former Dutch Indies Studiegroep ZWP (Zuid-West Pacific) over de perfins van Nederlands Indië
Romania Romania Stamps , Roemeense perfins
Scouting Scouts on Stamps Society International (SOSSI), perfins in scouting-zegels
USA The Perfins Club
South Africa Zenonas Zebrauskas uit Litouwen over de perfins van Zuid-Afrika
Switzerland Schweizerischer Ganzsachen-Sammler-Verein