@article{Kaplowitz2004,
author = {Kaplowitz, M.D. and Hadlock, T.D. and Levine, R.},
title= {A comparison of web and mail survey response rates},
year = {2004},
doi = {10.1093/poq/nfh006},
volume = {68},
number = {1},
pages = {94--101},
}