Pickett, Gerald. <br/><br/>
Equations for computing elastic constants from flexural and- torsional resonant frequencies of vibration of prisms and -cylinders / by Gerald Pickett. 

 - Chicago : Portland Cement Association, Research Laboratory 
 - [22] p. 
 - Bulletin 7 / Portland Cement Association .
<br/><br/> "Authorized reprint fromt the copyrighted Proceedings of th-e American Society of Testing Materials, Philadelphia, Pa. - Volume 45, 1945".