Materials for Chap 3 On the possibility of all organic beings occasionally crossing: 'Scraps about Plants all finally used', GBR/0012/MS DAR 49. Cambridge University Library.

Materials for Chap 3 On the possibility of all organic beings occasionally crossing: 'Scraps about Plants all finally used', GBR/0012/MS DAR 49. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/digital_objects/42621 Accessed December 04, 2023.