The play of animals
By: by Karl Groos ; translated with the author's co-operation by Elizabeth L. Baldwin ; with a preface and an appendix by J. Mark Baldwin
Contributors: Baldwin, Elizabeth L., translator; Baldwin, James Mark, 1861-1934, editor
Publisher: D. Appleton and Co.
Published: 1911
Place of publication: New York
Language: eng
Translated from: ger
Number of pages: 341
Subjects: Play behavior in animals