Catalogue of the A. N. H. S. lantern slide collection, arranged by subject, G. Geology 1-133, 1902-10. Papers of the Ashmolean Society, 1828-1901, the Oxfordshire Natural History Society and Field Club (O. N. H. S.), 1880-1901, and the Ashmolean Natural History Society (A. N. H. S.), 1901-84, Dep. d. 739. Bodleian Libraries. https://archives.bodleian.ox.ac.uk//repositories/2/archival_objects/50263 Accessed September 22, 2020.