Bradford, Ernle Dusgate Selby. Gibraltar: the history of a fortress [by] Ernle Bradford. - London, Hart-Davis, 1971. ISBN: 0246640391 L.2.50 LCCN: 76597538 Nat. Bib. No.: B71-14426 Subjects--Geographic Terms: Gibraltar -- History.--Gibraltar -- History. LC Class. No.: DP302.G38 / B7 Dewey Class. No.: 946/.89