Standard grading rules for Western lumber
By: approved by the Board of Review, American Lumber Standards
Publisher: Western Wood Products Association
Published: 1991
Place of publication: Portland, Or
Language: eng
Number of pages: 238
Subjects: Lumber; Grading
Other titles: Western lumber grading rules 91.; WWPA grading rules 91.
Notes: Spine title : WWPA grading rules 91.

Cover title : Western lumber grading rules 91.

On cover: "Effective September 1, 1991.  Supercedes all previous editions and supplements."