The Online Books Page

Books by Douglass F. Roy:

Books in the extended shelves:

• Roy, Douglass F.: The Clements growth prediction charts for residual stands of mixed conifers in California (U.S.D.A., 1955), also by California Forest and Range Experiment Station (page images at HathiTrust)
• Roy, Douglass F.: Guide to Yurok Redwood Experimental Forest (California Forest and Range Experiment Station, Forest Service in cooperation with Simpson Redwood Company, 1958), also by Kenneth N. Boe, Simpson Redwood Company, and Calif.) Pacific Southwest Forest and Range Experiment Station (Berkeley (page images at HathiTrust)
• Roy, Douglass F.: Silvical characteristics of Monterey pine (Pinus radiata D. Don) (Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966) (page images at HathiTrust)
• Roy, Douglass F.: Silvical characteristics of Redwood (S̲e̲q̲o̲i̲a̲ s̲e̲m̲p̲e̲ṟv̲i̲ṟe̲ṉs̲ [Ḏ Ḏon] E̲ṉḏḻ.) (Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966) (page images at HathiTrust)
• Roy, Douglass F.: Site preparation as related to ground cover density in natural regeneration of ponderosa pine (U.S.D.A., 1953), also by David Tackle and California Forest and Range Experiment Station (page images at HathiTrust)

Find more by Douglass F. Roy at your library, or elsewhere.