An Assessment of the Research Potential of 13 Ridgetop Archaeological Sites in Humboldt and Trinity Counties in Northwestern California. L. E. Weigel and D. A. Fredrickson. Sonoma State University Academic Foundation, 1982, 57 pp., 2 figs., available for reproduction costs from Six Rivers National Forest, Eureka, CA (paper). Archaeological Investigations on Pilot Ridge, Six. Rivers National Forest. William R. Hildebrandt and John F. Hayes. Sonoma State University Anthropological Studies Center, and San Jose State University Center for Anthropological Research, 1983, xii + 379 pp., 235 tables, 47 figs., 29 plates, available for reproduction costs from Sbc Rivers National Forest, Eureka, CA (paper). Archaeological Investigations on South Fork Mountain, Six Rivers and Shasta-Trinity National Forests. William R. Hildebrandt and John F. Hayes. Sonoma State University Anthropological Studies Center, and San Jose State University Center for Anthropological Research, 1984, 221 pp., 49 tables, 20 figs., 14 plates, available for reproduction costs from Six Rivers National Forest, Eureka, CA (paper). Archaeological Investigations on Pilot Ridge: Results of the 1984 Field Season. William R. Hildebrandt and John F. Hayes. Sonoma State University Anthropological Studies Center, and San Jose State University Center for Anthropological Research, 1985, iii + 151 pp., 22 figs., 22 plates, available for reproduction costs from Six Rivers National Forest, Eureka, CA (paper).