ESTUDIO DEL SELLO CONMEMORATIVO DEL CUARTO CENTENARIO DEL DESCUBRIMIENTO DE PUERTO RICO 1493-1893
Publisher: Editorial Casa del Sello
Published: 1991
Place of publication: Madrid, Spain
Format: Paperback
Number of pages: 112
Description: Historical study and philatelic plating of the postage stamp issued in Puerto Rico in 1893 to commemorate the 400 years of the discovery of that island by Christopher Columbus.

This philatelic study also covers the aspects of the postal usage of this commemorative stamp ―the first authorized by the Spanish authorities―, and well as a description of the philatelic counterfeits. 

The author of this book is a very well known Puerto Rican philatelist, who is also a prominent archaeologist and respected historian.