Author: Roen, John B. - Yale University Library GeoBlacklight Search Results

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1. Geologic map of the Midway quadrangle, Washington County, Southwestern Pennsylvania [cartographic material]

1973. 2012-04-03T14:27:30Z. 2012-05-03T15:36:10Z. Roen, John B. Geological Survey. English. Public. Pennsylvania and Washington County.

2. Geologic map of the Monongahela quadrangle, southwestern Pennsylvania [cartographic material]

1968. 2012-02-16T21:00:50Z. 2012-03-05T17:41:25Z. Roen, John B. U.S. Geological Survey. English. Public. Pennsylvania, Washington County, Alleghany County, and Westmoreland County.

3. Geologic map of the Oak Forest quadrangle and part of the Blacksville quadrangle, southwestern Pennsylvania

1972. 2012-11-13T20:49:29Z. 2012-11-13T20:49:29Z. Roen, John B. The Survey. English. Public. Pennsylvania and Greene County.

4. Geologic map of the Waynesburg quadrangle, Southwestern Pennsylvania

1970. 2012-02-29T15:33:42Z. 2012-02-29T15:33:42Z. Roen, John B. The Survey. English. Public. Pennsylvania, Greene County, and Washington County.

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