Watkins, A. J. <br/><br/>
Electrical installation calculations :  basic : for technical certificate level 2 / 
A. J. Watkins and Christopher Kitcher 
 - 8th ed. 
 - Oxford ; Burlington, MA :  Newnes,  c2009 
 - vii, 172 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>9781856176651 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric wiring--Mathematics<br/>Electric wiring--Problems, exercises, etc.