Borges, J. Ferry <br/><br/>
On the evaluation of the safety of old metallic bridges / J-. Ferry Borges, J. Marecos, L. Cunha Ferriz. 

 - Lisboa, Portugal : Laboratorio Nacional de Engenharia Civil 
 - 14 p. 
 - Technical paper; No.105 / Laboratorio Nacional de Enghenari-a Civil .