TY  - RPRT
TI  - A practical guide to assisted operating. 6. Basic conservation. 2.
AU  - E Paul
PY  - 1972
DO  - 10.1038/sj.bdj.4802937
UR  - https://pubmed.ncbi.nlm.nih.gov/4511889/
ID  - 4511889
ER  -