Historia de la telegrafía óptica en España
By: Sebastián Olivé Roig.
Publisher: Secretaría General de Comunicaciones, Ministerio de Transporte, Turismo y Comunicaciones
Published: 1990
Place of publication: Madrid
Language: spa
Number of pages: 101
Subjects: Signals and signaling -- Spain -- History -- 19th century.
Other titles: Telegrafía óptica.
Notes: Includes bibliographical references.