TY  - RPRT
TI  - An instrument for one- or two-dimensional tracking.
AU  - W C Roehrig
PY  - 1965
DO  - 10.2466/pms.1965.21.1.307
UR  - https://pubmed.ncbi.nlm.nih.gov/5828398/
ID  - 5828398
ER  -