Bertero, Vitelmo V. <br/><br/>
Research needs in limit design of reinforced concrete struc-tures: report submitted for review to the Joint ACI-ASCE Co-mmittee 428, Limit Design, September 1969 / by Vitelmo V. B-ertero. 

 - Berkeley, Calif. : enter 
 - 45 p. 
 - Report ; No. UCB/EERC 71-4. .