TY  - GEN
AU  - Shepard,D S
AU  - Neutra,R
TI  - Addendum to article on 'visit-based sampling'
SN  - 0090-0036
PY  - 1979///1024
KW  - Ambulatory Care
KW  - Health Services
KW  - statistics & numerical data
KW  - Humans
KW  - Sampling Studies
KW  - Statistics as Topic
N1  - Publication Type: Letter
UR  - https://doi.org/10.2105/ajph.69.9.954
ER  -