| A report from August 20, 2018 published by the Center for Survey Measurement, Research and Methodology Directorate, U.S. Census Bureau, Washington, D.C. 20233 quotes work published by IJLTFES. |
| A report from August 20, 2018 published by the Center for Survey Measurement, Research and Methodology Directorate, U.S. Census Bureau, Washington, D.C. 20233 quotes work published by IJLTFES. |