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Since 1980 (2nd ed. USA ed.). Hoard's Dairyman Books  ^ "American Livestock Breeds Conservancy, Conservation Priority List, 2012" ^ a b c

2010”. American Livestock Breeds Conservancy. 24 January 2011閲覧。 ^ “Clydesdale horse”. American Livestock Breeds Conservancy. 31 January 2011閲覧。 ^ “The Clydesdale

Leghorn Chicken American Livestock Breeds Conservancy, 1993–2009. Accessed December 2011. ^ Background On The Brown Leghorn Chicken American Brown Leghorn

October 2008閲覧。 ^ "Shetland Goose" American Livestock Breeds Conservancy. Retrieved 20 July 2009. ^ "Sheep Breeds - S-St". Sheep101.info. Retrieved 1

2023年12月25日閲覧。 ^ “Definition of a Heritage Turkey”. albc-usa.org. American Livestock Breeds Conservancy. July 20, 2008閲覧。 ^ a b c d e Center, Lee Digital Content