TY - MAP AU - AU - Herron, R.B. AU - Smith, Glenn S. AU - Hackett, Merrill AU - Duck, J.A. AU - Wilson, J.H. TI - Ohio Londonville Quadrangle Surveyed in 1912 in Cooperation with the State of Ohio U1 - 912.771 PY - 1914/// CY - Washington PB - US Geological Survey KW - Topographic Map N2 - Datum is mean sea level; Approximate mean declination 1912 ER -