TY  - RPRT
TI  - Guidelines for sampling in Flanders (Belgium).
AU  - F M Tack
AU  - M G Verloo
PY  - 2001
DO  - 10.1016/s0048-9697(00)00623-9
UR  - https://pubmed.ncbi.nlm.nih.gov/11213183/
ID  - 11213183
ER  -