TY  - RPRT
TI  - Introduction to biostatistics: Part 2, Descriptive statistics.
AU  - G M Gaddis
AU  - M L Gaddis
PY  - 1990
DO  - 10.1016/s0196-0644(05)82052-9
UR  - https://pubmed.ncbi.nlm.nih.gov/2310070/
ID  - 2310070
ER  -