Cohen, Louis, <br/><br/>
Research methods in education / 
by Louis Cohen and Lawrence Manion. 
 - London :  Croom Helm,  1985. 
 - 328 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0709934286 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.
<br/><br/><label>LC Class. No.: </label>LB1028.C64 1985