Spence, M. W. (1971). Some lithic assemblages of western Zacatecas and Durango, México. University Museum, Southern Illinois University.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua i Stíl Chicago (17ú heag.)
Spence, Michael W. Some Lithic Assemblages of Western Zacatecas and Durango, México. Carbondale, Illinois: University Museum, Southern Illinois University, 1971.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua MLA (9ú heag.)
Spence, Michael W. Some Lithic Assemblages of Western Zacatecas and Durango, México. University Museum, Southern Illinois University, 1971.
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.