Literature. 'OPUS' Vol. 7, 10, 14, 15, 18 and 22, AEP 2007–2022, each volume contains more than 200 pp. A great collection of articles, e.g. 'Swedish Postal History related to the International Polar Years', 'Transatlantic mail between the USA and Switzerland 1829–1875', 'The British Packet Office at Lisbon (1701–1859) and the Lisbon handstamps (1797–1859), etc. etc. Also two smaller publications. Scarce to obtain. Used. Approx. 5 kg.
