Londergan, Thomas Edward. “Porphyrin Studies. Synthetic Porphyrins from Pyrrole and the Mononitrobenzaldehydes and from Pyrrole and Piperonal.” Abstracts of Doctoral Dissertations, No. 34, The Ohio State University Press, 1941

Londergan, Thomas Edward. “Porphyrin Studies. Synthetic Porphyrins from Pyrrole and the Mononitrobenzaldehydes and from Pyrrole and Piperonal.” Abstracts of Doctoral Dissertations, No. 34, The Ohio State University Press, 1941, Box: 2, Folder: 70. Herbert T. Pratt Papers, GB14-030. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/33787 Accessed December 23, 2024.