Butler, John M, <br/><br/>
Quantitative naturalistic research :  an introduction to naturalistic observation and investigation / 
[by] John M. Butler, Laura N. Rice [and] Alice K. Wagstaff in collaboration with Sarah Counts Knapp. 
 - 122 páginas :  ilustraciones 
<br/><br/>Incluye bibliografía. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Análisis factorial.
<br/><br/><label>Dewey Class. No.: </label>151.26  / B985q 1963