@article{531662,
      note = {With a half-title.},
      author = {Ludlam, William,},
      url = {http://library.usi.edu/record/531662},
      title = {Directions for the use of Hadley's quadrant, with remarks  on the construction of that instrument. By the Reverend Mr.  Ludlam. [electronic resource] :},
      publisher = {printed by R. Hett, and sold by T. Cadell, in the Strand,},
      recid = {531662},
      pages = {ix,[7],137,[1]p.,plates ;},
      address = {London :},
      year = {1771},
}