Timing of first births : 1930-34 to 1990-94 / Amara Bachu. - Bachu, Amara (Population Division, U.S. Bureau of the Census, 1998)
"May 1998."
Keywords: Maternal age -- United States -- Statistics.; Marriage age -- United States -- Statistics.; Childbirth -- United States -- Statistics.; Marital status -- United States -- Statistics.; Childbirth.; Marriage age.; Maternal age.; United States.; Statistics.