TY  - RPRT
TI  - Mineralogy and instrumental neutron activation analysis of seven National Bureau of Standards and three Instituto de Pesquisas Tecnologicas clay reference samples
AU  - John W. Hosterman
AU  - F.J. Flanagan
AU  - Anne Bragg
AU  - M. W. Doughten
AU  - R.H. Filby
AU  - Catherine Grimm
AU  - J. S. Mee
AU  - P.J. Potts
AU  - N.W. Rogers
PY  - 1987
DO  - 10.3133/cir957
UR  - https://pubs.usgs.gov/publication/cir957
ID  - cir957
ER  -