title: [The numerousness judgement by the hooded crow of a set consisting of 12-25 elements].
authors.forename: Z A
authors.initials: ZA
authors.lastname: Zorina
authors.forename: A A
authors.initials: AA
authors.lastname: Smirnova
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D002755:Choice Behavior / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology; D006613:Higher Nervous Activity / Q000502:physiology*; D008433:Mathematics; D010775:Photic Stimulation / Q000379:methods
vernacular_title: Kolichestvennaia otsenka seroĭ voronoĭ mnozhestv, sostoiashchikh iz 15--25 élementov.