Beschreibung
Helbock, R. W., Postmarks On Postcards, An Illustrated Guide to Early Twentieth Century United States Postmarks, La Posta Publications, 1987, 248 S. #68658
Helbock, R. W., Postmarks On Postcards, An Illustrated Guide to Early Twentieth Century United States Postmarks, La Posta Publications, 1987, 248 S. #68658