Lindgren, W. Mineral deposits.
Lua i Stíl Chicago (17ú heag.)Lindgren, Waldemar. Mineral Deposits.
Lua MLA (8ú heag.)Lindgren, Waldemar. Mineral Deposits.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)