TY  - BOOK
AU  - Ketchum,Milo Smith
TI  - The design of highway bridges of steel, timber and concrete / 
PY  - 1920///
CY  - New York
PB  - McGraw-Hill book company, inc.; [etc., etc.]
KW  - PUENTES
KW  - PUENTES DE MADERA
KW  - PUENTES DE HORMIGON
KW  - PUENTES DE ACERO
ER  -