Surface water supply of the United States, 1966-70: Ohio river basin
McKelvey, V.E
Surface water supply of the United States, 1966-70: Ohio river basin - Washington 1972 - 1-700 p. - Washington Geological Survey .
Surface water supply of the United States, 1966-70: Ohio river basin - Washington 1972 - 1-700 p. - Washington Geological Survey .