Robertson, Ian, 1928-2020 Portugal / Ian Robertson. - [S.l.] : Arthaud, [1993] - 428 p., [8] p. de lám. : il. ; 19 cm. - Guides Arthaud . - Guides Arthaud . Biblioteca Jacinto Martínez Lacalle. ISBN: 2-7003-0980-4 Subjects--Geographic Terms: Portugal---Guías turísticas Universal Decimal Class. No.: 913(469)(036)