Monitoring vendor compliance with tobacco sales laws: payment vs no payment approaches.
Cummings
K M
KM
Saunders-Martin
T
T
Clarke
H
H
Perla
J
J
D000293:Adolescent; D000367:Age Factors; D003132:Commerce / Q000331:legislation & jurisprudence*; D003415:Crime; D006801:Humans; D009518:New York; D012907:Smoking / Q000331:legislation & jurisprudence*