416 | Bibliografía Mundial

2001. THE WORK OF JEAN SPERATI II. Robson Lowe and Carl Walske. Reeditado por The Royal Philatelic Society London. London, 2001.

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2001. THE WORK OF JEAN SPERATI II. Robson Lowe and Carl Walske. Republished by The Royal Philatelic Society London. London, 2001.