Randall, R. B. <br/><br/>
Frequency analysis / 
R. B. Randall 
 - [3rd ed.] 
 - Naerum, Denmark:   Bruel & Kjaer,   1987 
 - 344 p.:   ill.;   22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>8787355078 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frequencies of oscillating systems