Richards, J. A.  <br/><br/>
Analysis of periodically time-varying systems 
J. A. Richards 
 - Berlin  Springer-Verlag  1983 
 - xv+173p.  appendix; figs; refs; subj. index 
 - Communications and Control Engineering Series .
<br/><br/><label>ISBN: </label>3-540-11689-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Universal Decimal Class. No.: </label>517.5/.9  / RIC