@article{488144,
      author = {Carvalho, Walter M.},
      url = {http://library.usi.edu/record/488144},
      title = {U.S. coins: the price of a penny /},
      publisher = {Nova Science Publishers,},
      recid = {488144},
      pages = {xiv, 54 p. :},
      address = {New York :},
      year = {2009},
}