Brent, L <br/><br/>
Evaluation of a chimpanzee enrichment enclosure.  [electronic resource] 

 -  Journal of medical primatology  1991 
 - 29-34 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0047-2565 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Age Factors<br/>Animals<br/>Behavior, Animal<br/>Female<br/>Housing, Animal<br/>Male<br/>Pan troglodytes--psychology<br/>Play and Playthings<br/>Sex Characteristics<br/>Sex Factors