Allen J.A. 1912. [1]Archived 2015-05-07 at the Wayback Machine
Historical and nomenclatorial notes on North American sheep. Bulletin of the AMNHv. 31, article 1
Allen J.A. 1912. [1]Archived 2015-05-07 at the Wayback Machine
Historical and nomenclatorial notes on North American sheep. Bulletin of the AMNHv. 31, article 1