[1] Calambikidis and Steiger. 1995. Population estimates of humpback and blue whales made through photo-identification from 1993 surveys off California. Report to Southwest Fisheries Science Center, National Marine Fisheries Service, La Jolla, California. 36pp.
[2] Calambokidis and Barlow. 2004. Abundance of Blue and Humpback Whales in the Eastern North Pacific Estimated by Capture-Recapture and Line-Transect Methods. Marine Mammal Science 20(10):63-85
[3] NOAA Fisheries. 2001. Stock Assessment Report. Humpback Whale (Megaptera novaeangliae):Eastern North Pacific Stock. National Oceanic and Atmospheric Administration, Washington, D.C.
[4] NOAA Fisheries. 2005. Draft Stock Assessment Report. Humpback Whale (Megaptera novaeangliae): Central North Pacific Stock, revised Feb 12, 2005. National Oceanic and Atmospheric Administration, Washington, D.C.