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"Monmonier, Mark; Atterberry, Adrienne Lee; Fermin, Kalya; Marlzolf, Gabreille E.; and Hamlin, Madeleine, A Directory of Cartographic Inventors; Clever People who were Awarded a US Patent for a Map-related Device or Method (Amazon and Syracuse, NY: Bar Scale Press, 2018). ISBN 978-1985690226. CCBYND 4.0"
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