Beschreibung
Helme, James B. : Panama: American Bank Note Co. Index Cards: Issues Other than Airmails, 28 S., mit Abb., Beitrag in The Collectors Club Philatelist, Vol. 70, Nr. 2, 1991, (71 S.) #50180
Helme, James B. : Panama: American Bank Note Co. Index Cards: Issues Other than Airmails, 28 S., mit Abb., Beitrag in The Collectors Club Philatelist, Vol. 70, Nr. 2, 1991, (71 S.) #50180