http://richmond.bbb.org/WWWRoot//SitePage.aspx?site=85&id=a824b759-3137-43b5-aedf-a38056bcce73&debug=False 10 Tue, 04 May 2010 05:00:00 GMT The next phase of the 2010 Census begins in May and roughly 700,000 Census takers will start knocking on the doors of households that did not return their census form through the mail. http://richmond.bbb.org/article/2010-census-takers-knocking-on-doors-be-cooperative-but-cautious-19314