Pokras, Robert.
Hyattsville, Md. : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, 1997.
1997
Kozak, Lola Jean.
Hyattsville, Md. : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics ; Washington, DC : For sale by the U.S. G.P.O., Supt. of Docs., [1998]
1998