Duncan, J. M. <br/><br/>
effect of anisotropy and reorientation of principal stresse-s on the shear strength of saturated clay: a report of an i-nvestigation / by J. M. Duncan and H. Bolton Seed. 

 - Berkeley, Calif. : erials Research Laboratory 
 - [173] p. 
 - Report; No. TE-65-3 .