TY - RPRT TI - Developing an epidemiologic field team for drug dependence. AU - P H Hughes AU - G A Crawford AU - N W Barker PY - 1971 DO - 10.1001/archpsyc.1971.01750110001001 UR - https://pubmed.ncbi.nlm.nih.gov/5581262/ ID - 5581262 ER -