Housed at the Oregon State University Digital Archives, a collection of letters between former Tulane chairman of Internal Medicine George Burch and the Nobel Prize-winning researcher Linus Pauling are available online. The collection contains both personal and professional correspondence, with a focus on sickle cell research.
To access this collection of letters, and to view other correspondence between Linus Pauling and other researchers, go to the Oregon State University collection It's in the Blood! A Documentary History of Linus Pauling, Hemoglobin, and Sickle Cell Anemia.