1930. Mitchell, John, 1711-1768. Published in: Boundaries, areas, geographic centers and altitudes of the United States and the several states / Edward M. Douglas. Washington : Gov... U.S. Geological Survey (Washington,  D.C).
    
  
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      1923. Mitchell, John, 1711-1768. Facsimile.; Relief shown pictorially.; Caption title.; In top margin: U.S. Geological Survey, bulletin 689, plate III.; Published in: Boundaries, a... U.S. Geological Survey (Washington, D.C).