@article{337187,
      author = {Naigles, Letitia R. and Hoff, Erika, and Vear, Donna. and  Tomasello, Michael.},
      url = {http://library.usi.edu/record/337187},
      title = {Flexibility in early verb use : evidence from a multiple-N  diary study /},
      publisher = {Wiley-Blackwell,},
      recid = {337187},
      pages = {viii, 143 p. :},
      address = {Boston, Mass. :},
      year = {2009},
}