Trees from the Tongass provide the music of the world, writes Sarah Dahlstrom-Lehnert in a commentary for the Alaska Beacon.

Chaplin, New Intl. Assn. of Testing Materials, 1931, Zurich. Wilson, U.S. Dept. of Agr. Bulletin No. 282, March 1932. Unpublished data by F.P.R.L. on Sitka Spruce ...