@article{510393,
      note = {Receipt at foot, dated "No. 18, Leicester Square, London,  [blank] 179[blank]", was to be completed in manuscript and  to be signed by the patentee, Benjamin Douglas Perkins.},
      author = {Perkins, Benjamin Douglas,},
      url = {http://library.usi.edu/record/510393},
      title = {Directions for performing the metallic operation with  Perkins's patent tractors [electronic resource].},
      publisher = {s.n.,},
      recid = {510393},
      pages = {1 sheet ;},
      address = {[London,},
      year = {1798},
}