@misc{indiciaec1b54096864e,
  title = {Micro-PIXE analysis of silicate reference standards},
  author = {G.K. Czamanske and T. W. Sisson and J.L. Campbell and W.J. Teesdale},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70018033},
  note = {Source identifier: 70018033}
}