@article{136581,
  author = {Larry DeWerd and J Micka and R Laird and D Pearson and M O'brien and P Lamperti},
  title = {The Effect of Spectra on Calibration and Measurement With Mammographic Ionization Chambers},
  year = {2002},
  number = {29},
  month = {2002-01-01},
  publisher = {Medical Physics},
  language = {en},
}