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Archival descriptionGrand Manan Geological History Map, by F. J. Alcock, 1946
Grand Manan Geological History Map, by F. J. Alcock, 1946
Map #965A Grand Manan, by Dept. of Mines and Resources, Geology by F. J. Alcock, 1946
Map #965A Grand Manan, by Dept. of Mines and Resources, Geology by F. J. Alcock, 1946