Simpson, A. <br/><br/>
Testing methods and reliabilty: power 
A. Simpson 
 - london  machmilian  1978 
 - viii,;lll:176p.  pbk 
<br/><br/><label>ISBN: </label>0333184076 
<br/><br/><label>LC Class. No.: </label>TA410.S5 1978