Responsive systems  [videorecording] / 
Coastal Skills Training 
 - Virginia Beach, Va :  Coastal Video Communications Corp.,  1996 
 - 1 videodisc (17 min.) :  sd., col. ;  12 cm. 
<br/><br/><label>ISBN: </label>MED0000829(Local) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Switching circuits