TY  - RPRT
TI  - Selection of elderly controls using random digit dialing.
AU  - G W Olsen
AU  - J S Mandel
PY  - 1988
DO  - 10.2105/ajph.78.11.1487
UR  - https://pubmed.ncbi.nlm.nih.gov/3177729/
ID  - 3177729
ER  -