TY  - RPRT
TI  - Gravity goniometer. A simple and multipurpose tool.
AU  - R S Dhir
AU  - V A Ribera
AU  - M I Jacobson
PY  - 1971
UR  - https://pubmed.ncbi.nlm.nih.gov/5110935/
ID  - 5110935
ER  -