@article{319637,
      recid = {319637},
      author = {Schaie, K. Warner and Uhlenberg, Peter.},
      title = {Social structures : demographic changes and the well-being  of older persons /},
      publisher = {Springer,},
      address = {New York :},
      pages = {xiii, 314 p. :},
      year = {2007},
      url = {http://library.usi.edu/record/319637},
}