Brian Gisborne, John Calambokidis, Caitlyn Toropova, Dawn Goley, William Megill, James D. Darling, Volker Deecke, Merrill Gosho, Patrick Gearin, Christina M. Tombach,
Abundance, range and movements of a feeding aggregation of gray whales (Eschrichtius robustus) from California to southeastern Alaska in 1998 Journal of Cetacean Research and Management. ,vol. 4, pp. 267- 276 ,(2002)