Railways at the Zenith of Steam 1920-1940 By Nock, O. S. Books / Hardcover Transportation › Railroads Publisher: Macmillan, January 1970 Price $18.30 Free Shipping Send to a friend Used - Good With Dust Jacket Good condition. Good dust jacket. (railroads, history) $18.30 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.