@article{65422,
      author = {Wentworth, George, and Smith, David Eugene,},
      url = {http://library.usi.edu/record/65422},
      title = {Plane trigonometry and tables,},
      publisher = {Ginn},
      recid = {65422},
      pages = {190 p., 108 p.},
      address = {Boston,},
      year = {1951},
}