TY  - RPRT
TI  - Freebies: is the enemy us?
AU  - R P Ferguson
PY  - 1993
DO  - 10.7326/0003-4819-118-8-199304150-00032
UR  - https://pubmed.ncbi.nlm.nih.gov/8452342/
ID  - 8452342
ER  -