TY  - RPRT
TI  - Tangent screen perimetry using twin test objects.
AU  - J T Coyle
AU  - D F Milam
PY  - 1977
DO  - 10.1016/0002-9394(77)90926-6
UR  - https://pubmed.ncbi.nlm.nih.gov/868998/
ID  - 868998
ER  -