David Allen Fredrickson, an archaeologist noted for his sensitive excavations of California's ancient American Indian sites, died Aug. 28 at a care home in Walnut Creek. He was 85. During his long career as a professor of archaeology at Sonoma State University, Dr. Fredrickson was also widelyknown for his more informal career performing as a guitar-playing singer of cowboy songs. His immense folksong repertoire has been recorded by the Smithsonian Institution's Folkways program.
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