1. Alaska Department of Commerce and Economic Development.1993.Alaska Visitor Statistics Program AVSP. Alaska Visitor Arrivals Summer 1993. Alaska Department of Commerce and Economic Development Division of Tourism.135pp.
2. Alaska Department of Community and Economic Development 2004 64
3. Alaska Department of Environmental Conservation 2004 62
4. The effect of disturbance on harbor seal haul out patterns at Bolinas Lagoon, California;Allen S. G.;Fishery Bulletin,1984
5. Herd segregation in harbor seals at Point Reyes, California;Allen S. G.;California Fish and Game,1988