Fenland Research Committee: Minute book, and papers of Sir Grahame Clark, Hon. Secretary, GBR/0012/MS Add.9426. Cambridge University Library.

Fenland Research Committee: Minute book, and papers of Sir Grahame Clark, Hon. Secretary, GBR/0012/MS Add.9426. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/8659 Accessed March 29, 2023.