Sites de Museus Postais e Bibliotecas

American Philatelic Research Library
British Library Philatelic Collections
British library Philatelic Rarities
Musée de la Posta de Paris - France
Museo de la Casa da Moneda de Madrid - Spain
Museum of United States Essays and Proofs
National Philatelic Society Library - England
National Postal Museum - U.S.A.
Philatelic Museums & Libraries - England
Philatelic Museums & Libraries
Sigapore Philatelic Museum
Spellman Museum of Stamps and Postal History
Philatelic Museum Bangkok – the history of Thai postage stamps
Philatelistische Bibliothek München - Berlin - Alemanha
Philatelistische Bibliotheken in Deutschland