TY  - RPRT
TI  - Learning and the spiral illusion.
AU  - S D Houtman
PY  - 1974
DO  - 10.1111/j.2044-8295.1974.tb01395.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4841317/
ID  - 4841317
ER  -