@article{1368862,
      recid = {1368862},
      author = {Hickmann, Maya, and Veneziano, Edy, and Jisa, Harriet,},
      title = {Sources of variation in first language acquisition :  languages, contexts, and learners /},
      pages = {1 online resource (456 pages) :},
      url = {http://library.usi.edu/record/1368862},
}