Biben, M Contour variables in vocal communication between squirrel monkey mothers and infants. [electronic resource] - Developmental psychobiology Sep 1989 - 617-31 p. digital Publication Type: Journal Article ISSN: 0012-1630 Standard No.: 10.1002/dev.420220607 doi Subjects--Topical Terms: AnimalsFemaleMaternal BehaviorPitch PerceptionSaimiriVocalization, Animal