A ring of castles
Subtitle: fortresses of the Portuguese frontier
By: Rita Costa Gomes
Publisher: Ministério da Cultura; Instituto Portugués do Património Arquitectónico
Published: 2002
Place of publication: Lisbon
Language: eng
Translated from: por
Subjects: Castles; Military architecture
Notes: Includes bibliographical references and indexes.

Translated from Portuguese.
Table of contents: title: v. 1. Beira.