Feedback :  block 2, prepared by the course team / 
written by [John Sparkes]. 
 - 2nd ed. 
 - Milton Keynes,Great Britain :  The Open University,  1982. 
 - 24 p. :  ill. 
 - Living with technology, .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Feedback control systems.