Note 7 — Trees and Shrubs Furnishing Medicinal Barks.
Reading edition
Dewey, L. H. The Identity of American Upland Cotton. Science, n. s., vol. 19, p. 337. 1904. ↩
Dewey, L. H. Principal Commercial Plant Fibers. Yearbook, U. S. Dept. of Agriculture, 1903, p. 388. ↩