Basic electricity and electronics [video cassette] : direct current. 

 - England  Audio Visual Source  19--. 
 - 6 video cassette  sd., col.  1/2 in.  1 study guide 
<br/><br/> Colour recording systems: VHS/NTSC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric engineering<br/>Electronics
<br/><br/><label>Dewey Class. No.: </label>537 BAC 19--