TY  - RPRT
TI  - Some electronic control units for operant behavior studies. II. A random ratio generator.
AU  - W N SCHOENFELD
AU  - W W CUMMING
AU  - A G SNAPPER
AU  - P HAAS
PY  - 1960
DO  - 10.1901/jeab.1960.3-107
UR  - https://pubmed.ncbi.nlm.nih.gov/14443383/
ID  - 14443383
ER  -