simple method for the approximate computation of all the natural torsional frequencies of a member with variable cross-section
By: Helmut Wittmeyer.
Contributors: Royal Institute of Technology (Sweden). Division of Aeronautics
Series: Royal Institute of Technology. Division of Aeronautics. Technical notes -- 13
Publisher: Royal Institute of Technology, Division of Aeronautics
Published: 1951
Place of publication: Stockholm
Number of pages: 40
Notes: Bibliographical references: p. 34.