@article{West2010,
author = {West, B.T. and Olson, K.},
title= {How much of interviewer variance is really nonresponse error variance?},
year = {2010},
doi = {10.1093/poq/nfq061},
journal = {Public Opinion Quarterly },
volume = {74},
number = {5},
pages = {1104−1126},
}