Edin, Kathryn, 1962- Promises I can keep : why poor women put motherhood before marriage / Kathryn Edin and Maria Kefalas. - Berkeley : University of California Press, c2005. - 293 p. : ill., maps ; 24 cm. Includes bibliographical references (p. 269-285) and index. ISBN: 0520241134 (cloth : alk. paper) Subjects--Index Terms: Unmarried mothers Low-income single mothers