State Geological and Natural History Survey. (1930). Bulletin: State Geological and Natural History Survey. State Geological and Natural History Survey.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua i Stíl Chicago (17ú heag.)
State Geological and Natural History Survey. Bulletin: State Geological and Natural History Survey. Hartford, Conn: State Geological and Natural History Survey, 1930.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua MLA (9ú heag.)
State Geological and Natural History Survey. Bulletin: State Geological and Natural History Survey. State Geological and Natural History Survey, 1930.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.