9 pages (pp 721-729) IN: Journal of Biological Chemistry, vol. 133, no. 3, May 1940. 8vo, modern wrappers. Baltimore, 1940. First Edition. Whole number 3 offered Entire.
Structural formula of vitamin K-2. With R.W. McKee, Sidney A. Thayer, and Edward A. Doisy. Dam and Doisy shared a Nobel Prize in 1943 for their work on vitamin K. Garrison-Morton 1082.