TY  - RPRT
TI  - Polite responses to polite requests.
AU  - H H Clark
AU  - D H Schunk
PY  - 1980
DO  - 10.1016/0010-0277(80)90009-8
UR  - https://pubmed.ncbi.nlm.nih.gov/7389285/
ID  - 7389285
ER  -