@article{62904,
      author = {Lawson, Chester A. and Paulson, Richard E.,},
      url = {http://library.usi.edu/record/62904},
      title = {Laboratory and field studies in biology; a sourcebook for  secondary schools.},
      publisher = {Holt, Rinehart and Winston},
      recid = {62904},
      pages = {281 p.},
      address = {New York,},
      year = {1960},
}