Production The Douglas-fir region produces approximately 30 percent of the total lumber cut in the United States. ... in 1929; in the last 2 years the ratio increased slightly, and in 1935 it reached 41 percent. ... This dependence upon outside markets apparently will continue for many years if current rates of production are anbsp;...
|Title||:||Forest resources of the Douglas-fir region|
|Author||:||Horace Justin Andrews, Robert William Cowlin|