TY  - RPRT
TI  - Methodological problems in the study of human populations.
AU  - W G COCHRAN
PY  - 1963
DO  - 10.1111/j.1749-6632.1963.tb13293.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14021885/
ID  - 14021885
ER  -