TY  - RPRT
TI  - A system for processing by digital computer spirograms acquired in field surveys.
AU  - C J Derrett
AU  - C Brown
PY  - 1975
DO  - 10.1136/thx.30.6.674
UR  - https://pubmed.ncbi.nlm.nih.gov/1221554/
ID  - 1221554
ER  -