How lumber is graded
By: by H.S. Betts and R.K. Helphenstine
Contributors: Helphenstine, R. K. (Rufus King), b. 1882; United States. Forest Service
Edition: Rev., Sept. 1933
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
Number of pages: 48
Subjects: Lumber; Grading
Notes: "Issued , March 1920."

Title from cover.

"Contribution from Forest Service, Branch of Research"--p. 48.