TY  - RPRT
TI  - An improved gonioscopic contact prism.
AU  - L ALLEN
AU  - A E BRALEY
AU  - H E THORPE
PY  - 1954
DO  - 10.1001/archopht.1954.00920040461004
UR  - https://pubmed.ncbi.nlm.nih.gov/13137639/
ID  - 13137639
ER  -