【作者(必填)】Don E. Bradley
【文题(必填)】Litwak and Longino’s Developmental Model of Later-Life Migration: Evidence From the American Community Survey, 2005–2007
【年份(必填)】2011
【全文链接或数据库名称(选填)】http://jag.sagepub.com/content/30/2/141

谢谢帮助！