Berger, W. H.; Lange, C. B. (1998): Silica depletion in the thermocline of the glacial North Pacific; corollaries and implications. Pergamon Press, Oxford - New York, International, In: Chavez, Francisco P. (editor), Collins, Curtis A. (editor), Topical studies in oceanography; studies of the California current system; Part 1, 45 (8-9), 1885-1904, georefid:1999-035536