TY  - RPRT
TI  - Survey return rates as a function of priority versus first-class mailing.
AU  - Christiane Brems
AU  - Mark E Johnson
AU  - Teddy Warner
AU  - Laura Weiss Roberts
PY  - 2006
DO  - 10.2466/pr0.99.2.496-501
UR  - https://pubmed.ncbi.nlm.nih.gov/17153820/
ID  - 17153820
ER  -