Historical winter and summer distribution of large whales along the eastern North Pacific coast based on data from the US whale marking program, 1962-1969
Mizroch, S. A., Balcomb, K. C. and Rice, D. W
International Whaling Commission
From 1962 through 1969, the US Whale Marking Program conducted 11 dedicated whale sightings and marking cruises along the eastern North Pacific coast from northern California to the southern tip of Baja California and beyond. Most surveys were conducted in winter months and 991 groups of large whales were sighted.