Geology of the Waterford quadrangle,Virginia and Maryland and the Virginia part of the Point of Rocks quadrangle / W.C.Burton,A.J.Froelich,J.S.Pomeroy,K.Y.Lee, 1995. - IV,30 p. p. - Текст : непосредственный.
Lee K.Y. Triassic-Jurassic statigraphy of the Culpeper and Barboursville basins, Virginia and Maryland / K.Y.Lee,A.J.Froelich, 1989. - IV, 52 p. 52 p. - Текст : непосредственный.