Railroads of the Black Hills by Mildred Fielder.
Bonanza Books, New York. Hardcover w/dust jacket, undated printing of the 1964 copyright. 4to with pale orange cloth boards, dark brown lettering on the spine, 176 pages. This copy is in very good condition with clean & unmarked text, tight binding, and minimal wear to the cover. The dust jacket has some rub ans small edge tears and creases.