TY - BOOK AU - Pickett, Gerald. TI - Equations for computing elastic constants from flexural and- torsional resonant frequencies of vibration of prisms and -cylinders / by Gerald Pickett CY - Chicago : Portland Cement Association, Research Laboratory N1 - "Authorized reprint fromt the copyrighted Proceedings of th-e American Society of Testing Materials, Philadelphia, Pa. - Volume 45, 1945" ER -