TY  - RPRT
TI  - A versatile and inexpensive planimeter system.
AU  - P C Brunjes
PY  - 1983
DO  - 10.1016/0165-0270(83)90056-0
UR  - https://pubmed.ncbi.nlm.nih.gov/6688281/
ID  - 6688281
ER  -