Morton1905:
MiNr VE 554-562 Issued on: 18.II.1950 U.P.U. (Universal Postal Union), 75th Anniversary
Morton1905:
s008a 9684 EncLZ1962-6 Peru, Colombia, Ecuador, i Venezuela Zagreb MCMLXII Enciklopedija Leksikografskog zavoda Ekvador, Kolumbija