TY  - RPRT
TI  - Sustained performance during very long experimental sessions.
AU  - B F Skinner
AU  - W H Morse
PY  - 1958
DO  - 10.1901/jeab.1958.1-235
UR  - https://pubmed.ncbi.nlm.nih.gov/16811224/
ID  - 16811224
ER  -