@article{63571,
      author = {Pettingill, Olin Sewall,},
      url = {http://library.usi.edu/record/63571},
      title = {A laboratory and field manual of ornithology;},
      publisher = {Burgess Pub. Co.,},
      recid = {63571},
      pages = {viii, 381 p.},
      address = {Minneapolis,},
      year = {1956},
}