Infant chimpanzees spontaneously perceive both concrete and abstract same/different relations /  
David L. Oden, Roger K. R. Thompson, David Premack 
 - Chicago 
<br/><br/><label>Subjects--Topical Terms: </label><br/>APRENDIZAJE ANIMAL<br/>COMUNICACION ANIMAL<br/>DESARROLLO COGNITIVO<br/>PERCEPCION