@article{60492,
      author = {Mayall, R. Newton and Mayall, Margaret W.},
      url = {http://library.usi.edu/record/60492},
      title = {Sundials, how to know, use, and make them,},
      publisher = {Sky Pub. Corp.},
      recid = {60492},
      pages = {xvi, 250 p.},
      address = {Cambridge, Mass.,},
      year = {1973},
}