2000 Ministry of Environment, Lands and Parks The vertebrates of British Columbia: scientific and English names [Vertébrés de Colombie Britannique : noms scientifiques et anglais]. Standards for components of British Columbia's biodiversity, Version 2.1.
1998 Ministry of Environment, Lands and Parks. Inventory Methods for Pikas and Sciurids: Pikas, Marmots, Woodchuck, Chipmunks and Squirrels [Méthodes d’inventaire pour les Pikas et les Scuiridés : Pikas, Marmottes, Tamias et Écureuils]. Standards for Components of British Columbia’s, Biodiversity No.29. Prepared by Ministry of Environment, Lands and Parks, Resources Inventory Branch for the Terrestrial Ecosystems Task Force, Resources Inventory Committee, Version 2.0.