Zorina, Z A <br/><br/>
[The numerousness judgement by the hooded crow of a set consisting of 12-25 elements].  [electronic resource] 

 -  Zhurnal vysshei nervnoi deiatelnosti imeni I P Pavlova   
 - 389-92 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0044-4677 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Birds--physiology<br/>Choice Behavior--physiology<br/>Discrimination, Psychological--physiology<br/>Higher Nervous Activity--physiology<br/>Mathematics<br/>Photic Stimulation--methods