@article{Sadler:89105,
      author       = "Sadler, Randall  (University of Illinois at
                      Urbana-Champaign)",
      title        = "<a
                      href="/search?f=title&p=Virtual%20Worlds%20%3A%20an%20Overview%20and%20Pedagogical%20Examination&sc=1&ln=en">Virtual
                      Worlds : an Overview and Pedagogical Examination</a>",
}