Canadian philately [bibliography and Index] / Cimon Morin
Canadian philately [bibliography and Index] : supplément / Cimon Morin
Portugal : ceres variedades de cliché / J. M. Miranda da Mota e Armando Mário de Oliveira Vieira; pref. Albertino de Figueiredo
Emisiones postales dominicanas / Danilo A. Mueses