@article{77504,
      author = {Brockman, C. Frank and Merriam, Lawrence C.,},
      url = {http://library.usi.edu/record/77504},
      title = {Recreational use of wild lands},
      publisher = {McGraw-Hill},
      recid = {77504},
      pages = {xii, 329 p.},
      address = {New York,},
      year = {1973},
}