Martin J.D. Effects of surface coal mining and reclamation on the geohidrology of six small waterheds in West-Central Indiana / J. D. Martin, R. F. Duwelius, Ch. G. Grawford, 1990. - VIII,72 p. p. - Текст : непосредственный.
Water-supply paper / US.Geol.survey. 2368-A : Description of the physical environment and coal-mining history of west-central Indiana,with emphasis on six small watersheds / J.D.Martin,C.G.Crawford,R.F.Duwelius,D.E.Renn, 1990. - 38 p. - Текст : непосредственный.