531.32 Wil P Wilson ,William Ker Practical solution of torsional vibration problems,with examples from marine , electrical, aeronautical,and automobile engineering practice,3d .ed .rev .New York ,J .Wiley, 1956.t.ilus .,diagrs.(1 pleg.) Tablas. 22cm. Incluye bibliografia Contiene :t . l .Frecuency calculations.