Boorder, H. d. (1965). Petrological investigations in the Aguiar da Beira granite area, northern Portugal. Grafisch Centrum Deltro.
Lua i Stíl Chicago (17ú heag.)Boorder, Hugo de. Petrological Investigations in the Aguiar Da Beira Granite Area, Northern Portugal. Rotterdam, Neth.: Grafisch Centrum Deltro, 1965.
Lua MLA (8ú heag.)Boorder, Hugo de. Petrological Investigations in the Aguiar Da Beira Granite Area, Northern Portugal. Grafisch Centrum Deltro, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.