@article{188011,
      url = {http://library.usi.edu/record/188011},
      title = {Microworlds : student activity book /},
      publisher = {Carolina Biological Supply Company,},
      recid = {188011},
      pages = {iii, 61 p. :},
      address = {Burlington, N.C. :},
      year = {1991},
}