prepared by United States Department of Agriculture, Forest Service, Alaska Region Public Services.United States Department of Agriculture, Forest Service, Alaska Region1997.<Y622-B4>
prepared by Forest Service, Alaska Region.United States Department of Agriculture, Forest Service, Alaska Region, Tongass National Forest1997.<Y622-B16>
Charles J. Barnett [and three others].United States Department of Agriculture, Forest Service, Northeastern Area, Northeastern Forest Experiment Station1997.<Y622-B17>