@book{hobson:1928:ato,
    author = {Hobson, E. W.},
     title = {A Treatise on Plane and Advanced Trigonometry},
   edition = {7th},
 publisher = {Cambridge University Press},
      note = {Reprinted by Dover Publications Inc., New York, 2004.},
      year = {1928},
     pages = {xv+383},
   mrclass = {48.0X},
  mrnumber = {MR0090820 (19,876h)},
     zblno = {0078.13205}}