Sir Ernest Clarke: Lectures on the history of agriculture, GBR/0012/MS Add.8095-8096. Cambridge University Library.

Sir Ernest Clarke: Lectures on the history of agriculture, GBR/0012/MS Add.8095-8096. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/7468 Accessed March 27, 2023.