TY  - RPRT
TI  - Vertical vs horizontal presentations in the visual cliff apparatus.
AU  - C Z Somervill
AU  - J W Somervill
PY  - 1977
DO  - 10.2466/pms.1977.45.1.18
UR  - https://pubmed.ncbi.nlm.nih.gov/905077/
ID  - 905077
ER  -