@misc{indiciaed0858d2ab22f,
  title = {Mineralogy and instrumental neutron activation analysis of seven National Bureau of Standards and three Instituto de Pesquisas Tecnologicas clay reference samples},
  author = {John W. Hosterman and F.J. Flanagan and Anne Bragg and M. W. Doughten and R.H. Filby and Catherine Grimm and J. S. Mee and P.J. Potts and N.W. Rogers},
  year = {1987},
  doi = {10.3133/cir957},
  url = {https://pubs.usgs.gov/publication/cir957},
  note = {Source identifier: cir957}
}