Postage stamp collecting

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Karoly, Szucs - The Stamps of the Monarchy for Special Collectors
Hungarian stamp collectors page who is interested in stamps issued during the time of the Austria-Hungary monarchy or empire

Ambrozai, Attila - Hungarian Stamp Collection
Hungarian stamp collectors page specializes in Hungarian philately, plus some souvenir sheets. He displays scans of his collection in an online gallery

Heimer, Zeljko - The Chronology of Postal Authorities Issuing Stamps in Croatia and Bosnia-Herzegovina
Hungarian stamp collectors page that has a timeline of different philately bureaus in the postal history of Croatia and Bosnia