Literature. AEP, Opus Vol. 7, 10, 14, 15, 18 and 22, in total six volumes, approx. 1400 pp., printed in limited edition primarily for the members of the Academie Europeenne de Philatelie. Also one small booklet about philatelic research and two handouts, issued by AEP. Useful and sought-after. All used. (9). Approx. 6 kg.