List of Billig's Philatelic Handbooks The Billig's books are often quite confusing as there are at least four different series that go by similar titles. This listing is intended to give a working...
The Private Mail Carriers of Colombia, By Dieter Bortfeldt with Carlos Valenzuela and Alfredo Frohlich, published by COLOMPHIL, the Colombian Philatelic Research Society, Bogota, May 2006 This magnificent book...
E. F. Hurt and L. N. M. Williams. Handbook of the Private Local Posts . Billig's Specialized Catalogues 6, USA 1950.This book always leads to some confusion as most collectors thing it is part of the 44 volume...
Colombia, Catalogo Histórico Filatélico, Edition Especializado, 1984 by Leo Temprano,I must admit, this catalogue is not the most recent one but so far, in my strong believe, the most complete and...
