@article {309676, title = {Arithmetic in the Chimpanzee Basso in the Frankfurt Zoological Park Together With Remarks to Animal Psychology and an Open Letter to Herr Krall From Karl Marbe: Introduction to Translation}, journal = {The American Journal of Psychology}, volume = {124}, year = {2011}, pages = {463-488}, issn = {00029556}, url = {http://www.jstor.org/stable/10.5406/amerjpsyc.124.4.0463}, author = {Marbe, K. and Shaw, H. L. and Gardner, R. A.} }