“Total Body Bone Area, Bone Mineral Content, and Bone Mineral Density for Individuals Aged 8 Years and Over: United States, 1999-2006,” by Anne C. Looker, Lori G. Borrud, Jeffery P. Hughes, Bo Fan, John A. Shepherd, and Mary Sherman (Vital and Health Statistics, Series 11, No. 253, August 2013, .pdf format, 79p.).