@article{51508,
      note = {Includes index.},
      author = {Zimmer, Rudolf A.},
      url = {http://library.usi.edu/record/51508},
      title = {Basic trigonometry with applications in technology /},
      publisher = {Kendall/Hunt Pub. Co.,},
      recid = {51508},
      pages = {vii, 239 p. :},
      address = {Dubuque, Iowa :},
      year = {1980},
}