American softwood lumber standard
By: a voluntary standard developed by the National Bureau of Standards in  cooperation with producers, distributors, and users.
Publisher: U.S. Dept. of Commerce : for sale by the Supt. of Docs., U.S. Govt. print. Off.
Published: 1986
Place of publication: Washington, D.C
Language: eng
Number of pages: 26
Subjects: Lumber -- Standards
Notes: Cover title.

"NBS voluntary product standard PS20-71, amended-1986."