TY  - RPRT
TI  - Chimpanzee counting and rhesus monkey ordinality judgments
AU  - Rumbaugh, Duane M.
AU  - Washburn, David A.
AU  - Hopkins, William D.
AU  - Savage-Rumbaugh, E. S.
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19920065473
ID  - 19920065473
ER  -