Irwin D M <br/><br/>
Observational strategies for child study 
Irwin D M; Bushnell M M 
 - N York   Holt        1980 
 - xii, 276p.  cm. 
<br/><br/><label>Standard No.: </label>83,227 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSYCHOLOGY
<br/><br/><label>Dewey Class. No.: </label>S1:f, M0