@article{531874,
      recid = {531874},
      author = {Martin, Benjamin,},
      title = {The method of calculating the magnifying power of a  reflecting telescope, illustrated by example. With a  general table of all the Magnifying Powers of 12 such  Telescopes, from 4 to 100 Inches focal Distance of the  Great Speculum. [electronic resource] :},
      publisher = {s.n.,},
      address = {[London,},
      pages = {8p. ;},
      year = {1771},
      note = {Anonymous. By Benjamin Martin.},
      url = {http://library.usi.edu/record/531874},
}