Sunley, J.G. Forest products research : grade stresses for structural timber / J.G. Sunley. - 3rd ed. (Metric Unites) - London : Her Majesty's Stationary Office, 1968. - vii, 18 p. : ill. ; 30 cm. Bulletin no. 47 for visually and mechanically graded materials Includes bibliographical references Subjects--Topical Terms: Forest products.Forest protection.Timber--Grading. Dewey Class. No.: 634.98