A B C D E F G H I J-K L M N O P Q-R S T U V W-Y
close this section of the libraryWood poles.(1)
View the documentSpiral grain : a cause of pole twisting / by Charles A. Wellner and David P. Lowery. Wellner, C. A. Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1967.