Martin, Benjamin, 1769, 1764 - "Physico-geology: or, A New System of Philosophical Geology", London

Martin, Benjamin, 1769, 1764 - "Physico-geology: or, A New System of Philosophical Geology", London, Box: 2, Folder: 100. Research papers gathered for A Carto-Bibliography of the Maps in Eighteenth-Century English and American Geography Books, MS 287. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/234136 Accessed December 25, 2025.