Viswanathan, R. <br/><br/>
An automatic control system for resonance trcking in structural vibration testing  / 
R. Viswanathan ; published by National Aeronautical Laboratory 
 - Bangalore :  National Aeronautical Laboratory,  1974 
 - i,09 p. ;  28 cm. 
 - Nal Technical Note TN-47 .
<br/><br/><label>Dewey Class. No.: </label>629.13072