Blum, M.L. Foos, P.W. <br/><br/>
Data gathering experimental methods plus 

 -  1986 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Social Science-Research-Methodolgy<br/>Social Surveys
<br/><br/><label>Dewey Class. No.: </label>300.72  / B63D