1. Official log scaling and grading rules for the Pacific Northwest. Effective May 1, 1948;PSLSGB,1948
2. 2018–2019 Uniform Standards of Professional Appraisal Practice (USPAP);USPAP,2018
3. Washington State Department of Natural Resources Log Market Reports;WaDNR,2019
4. Forest products prices and National Forest Timber Supply in the Douglas-fir region;Adams;For. Sci.,1974