Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThree Methods of Estimating Births Averted Nationally by ContraceptionAuthorsLiu, Li; Becker, Stan; Tsui, Amy; Ahmed, SaifuddinPublicationPopulation Studies, 2008, Vol 62, Issue 2, p191ISSN0032-4728Publication typearticle