(1949). Vol. 44, № 5-6; Economic Geology. 1949.
Lua i Stíl Chicago (17ú heag.)Vol. 44, № 5-6; Economic Geology. 1949, 1949.
Lua MLA (9ú heag.)Vol. 44, № 5-6; Economic Geology. 1949, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.