TY  - RPRT
TI  - How to be less invasive.
AU  - A C Powles
AU  - E J Campbell
PY  - 1979
DO  - 10.1016/0002-9343(79)90079-2
UR  - https://pubmed.ncbi.nlm.nih.gov/463922/
ID  - 463922
ER  -