TY  - RPRT
TI  - Introduction to biostatistics: Part 1, Basic concepts.
AU  - M L Gaddis
AU  - G M Gaddis
PY  - 1990
DO  - 10.1016/s0196-0644(05)82149-3
UR  - https://pubmed.ncbi.nlm.nih.gov/2297161/
ID  - 2297161
ER  -