Jennings, P.C. <br/><br/>
Forced vibration of a 22-story steel frame building / by P.-C. Jennings , R.B. Matthiesen and J. Brent Hoerner. 

 - Pasadena, Calif. : Research Laboratory 
 - 99 p. 
 - [Report] ; EERL 70-01 / CALTEC, Earthquake Engineering Rese-arch Laboratory .