Supplement to how lumber is graded
By: [H.S. Betts and R.K. Helphenstine]
Contributors: Helphenstine, R. K. (Rufus King), b. 1882; United States. Forest Service
Series: United States. Dept. of Agriculture. Department circular -- no. 64; Department circular (United States. Dept. of Agriculture) -- no. 64.
Publisher: U.S. Dept. of Agriculture
Published: 1933
Place of publication: Washington, D.C
Language: eng
Subjects: Lumber; Grading
Notes: Mostly tables.