Western hemlock bark an important potential tanning material
Smoot, C.C., Frey, R.W.
Western hemlock bark an important potential tanning material - Washington 1937 - 1-48 p. - United States Department of Agriculture. Technical Bulletin No. 566 .
Western hemlock bark an important potential tanning material - Washington 1937 - 1-48 p. - United States Department of Agriculture. Technical Bulletin No. 566 .