654 K Ketchum, Milo Smith , 1872 - The design of highway bridges of steel , timber and concrete , by Milo S . Ketchum . 2a ed . , rewritten . Ist thousand , total issue 6 , 000 . New York , McGraw-Hill book company , inc . ; [etc . , etc .] 1920 . xv , 548 p . incl . ilus . tablas . diagrs . (part fold .) 23 cm .