The mentality of apes
vi, 336 pages, 5 unnumbered leaves of plates : illustrations ; 19 cm
9780871401083, 0871401088
2000769
Roundabout methods
The use of implements
The use of implements (continued), handling of objects
The making of implements
The making of implements (continued), building
Detours with intermediate objectives
"Change" and "imitation"
The handling of forms
Some contributions to the psychology of chimpanzees
Translation of Intelligenzprüfungen an Menschenaffen