Forel, Robert William. Railroads and American econmic growth : essays in econometric his tory / Robert William Forel. - Baltimore, Md. : Johns Hopkins Press, 1964. - xv, 296 p. : ill., maps ; 24 cm. Bibliography: p. 263-285. Subjects--Topical Terms: Railroads --History.--United States ---- Subjects--Geographic Terms: United States -- Economic conditions. Dewey Class. No.: 385.0973 FOG