@article{324441,
      recid = {324441},
      author = {Grego, Peter.},
      title = {Venus and Mercury, and how to observe them /},
      publisher = {Springer,},
      address = {New York, :},
      pages = {xiii, 262 p. :},
      year = {2008},
      url = {http://library.usi.edu/record/324441},
}