Notebooks of J S Haldane containing brief notes and arithmetical calculations apparently in connexion with his investigations into gases and respiration in mines., 1903, 1913., MSS.20236-20238. Correspondence and papers of and concerning John Scott Haldane, physiologist and philosopher., MSS.20231-20239. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/42892 Accessed September 23, 2024.