Proceedings of the National Academy of Sciences of the United States of America

Journal Article Proceedings of the National Academy of Sciences of the United States of America Get access John E. Dowling, John E. Dowling BIOLOGICAL LABORATORIES OF HARVARD UNIVERSITY, CAMBRIDGE Search for other works by this author on: Oxford Academic PubMed Google Scholar George Wald George Wald BIOLOGICAL LABORATORIES OF HARVARD UNIVERSITY, CAMBRIDGE Search for other works by this author on: Oxford Academic PubMed Google Scholar Nutrition Reviews, Volume 39, Issue 3, March 1981, Pages 135–138, https://doi.org/10.1111/j.1753-4887.1981.tb06752.x Published: 01 March 1981