@article{024-001-03576-6,
      recid = {137497},
      author = {Gundersen, L. C. S. and Wanty, Richard B.},
      title = {Field studies of radon in natural rocks, soils, and water  /},
      publisher = {U.S. Geological Survey ;},
      address = {Reston, VA :},
      number = {024-001-03576-6},
      pages = {xxi, 334 p. :},
      year = {1991},
      url = {http://library.usi.edu/record/137497},
}