wikimedia
/
wikidata
/
Login
Register
TriplyDB
Wikidata
Browser
Triples
Insights
Schema
BETA
Class frequency
Class hierarchy
SPARQL
Graphs
1
JOURNAL.PONE.0028108
JOURNAL.PONE.0028108
http://dx.doi.org/10.1371/JOURNAL.PONE.0028108
Gift card incentives and non-response bias in a survey of vaccine providers: the role of geographic and demographic factors.
P356
Q30224866-E32493E2-0D3B-42C2-9E20-1199214F3E95
P356
JOURNAL.PONE.0028108
http://dx.doi.org/10.1371/JOURNAL.PONE.0028108