Barbelin, Hervé: À l'aube de la philatélie. Oscar Berger-Levrault. Ouvrages et correspondance (1860–1869), (Paris 2019), 218 pages, Errata page, softcover, plus Barbelin, Hervé: At the dawn of Philately. Oscar Berger-Levrault. Works and Correspondance (1860–1869) (Schwalmtal 2022), 218 pages, hardcover, signed by Barbelin and the publisher Wolfgang Maassen. – This is a very important book, because for the first time Berger-Levrault's price lists from 1861 onwards are documented and much more. – PLUS: Negus, James: Philatelic Literature. Compilation Techniques and Reference Sources (1991), 293 pages, hardcover, dust jacket. All items in good condition. Estimate: 100 Euro
