@techreport{Johnson2009,
author = {Johnson, K. and Grant, M. and Khan, S. and Moore, Z. and Armstrong, A. and Sa, Z.},
title= {Fieldwork-related factors and data quality in the demographic and health surveys program},
year = {2009},
URL = {http://www.measuredhs.com/pubs/pdf/AS19/AS19.pdf},
publisher = {ICF Macro},
address = {Calverton, Maryland, USA},
number = {DHS Analytical Studies No. 19 },
}