TY  - RPRT
TI  - Can observational studies replace or complement experiment?
AU  - S van der Linden
AU  - C H Goldsmith
AU  - J Woodcock
AU  - V Nassonova
PY  - 1994
UR  - https://pubmed.ncbi.nlm.nih.gov/7799388/
ID  - 7799388
ER  -