https://geodata.lib.berkeley.edu/catalog/f5606610-4c61-0134-1dad-0050569601ca-d
Arthur, Douglas & Moultrie Co's., Ill., September 1907 - UC Berkeley GeoData
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https://museum.wales/collections/online/agent/cd3642e1-f57c-30a9-872d-c425958a4c7d/PEPPERCORN-Arthur-Douglas/?field0=string&value0=James%20Dickson%20Innes&field1=with_images&value1=1
PEPPERCORN, Arthur Douglas - Collections Online | Museum Wales
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https://deboermarine.nl/project-highlight-arthur-douglas/
Project Highlight: Arthur Douglas - De Boer Marine | Global partner for marine electronics
Jul 15, 2024 - De Boer Marine | Global partner for marine electronics De Boer VSAT Maritime Project Highlight: Arthur Douglas Satellite Connectivity News %
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https://www.itpapulling.com/results-2019-07-11/
2019-07-11 – Moultrie-Douglas Co. Fair – Arthur, IL – ITPA
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