@article{197944,
      recid = {197944},
      author = {Long, H. Keith. and Farrar, Jerry W.},
      title = {Report on the U.S. Geological Survey's evaluation program  for standard reference samples distributed in October 1992,  T-121 (trace constituents), M-124 (major constituents),  N-36 (nutrients), N-37 (nutrients),   P-19 (low ionic  strength) and Hg-15 (mercury) [microform] /},
      publisher = {Dept. of the Interior, U.S. Geological Survey ;},
      address = {Golden, Colo. :},
      pages = {iii, 114 p. :},
      year = {1993},
      note = {Distributed to depository libraries in microfiche.},
      url = {http://library.usi.edu/record/197944},
}