TY  - RPRT
TI  - Methods for analyzing referral patterns.
AU  - M E Cowen
AU  - M W Zodet
PY  - 1999
DO  - 10.1046/j.1525-1497.1999.06368.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10491231/
ID  - 10491231
ER  -