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2. California State Board of Equalization (BOE) 〈http://www.boe.ca.gov/〉, 2004.
3. California Forest Products Commission (CFPC) 〈http://www.calforests.org/〉, 2004.
4. Spelter H. Conversion of board foot scaled logs to cubic meters in Washington State, 1970–1998, FPL-GTR-131. Department of Agriculture, Forest Service, Forest Products Lab., Madison, WI, US, 2002.
5. Shelly J. Personal communication, College of Natural Resources, University of California, Berkeley, CA, 2005.