FLORA, Donald F. - MACGINNIS, Wendy J. Effects of New Export Rules, a Spotted Owl Plan, and Recession on Timber Prices and Shipments from the Douglas-Fir Region. Research Paper PNW-RP-445. 1.vyd. Portland : U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1992. 15 s.: 3 obr., 3 tab.