TY - RPRT TI - Sample preparation procedures for the analysis of clay minerals by X-ray diffraction AU - P. L. Hauff AU - H.C. Starkey AU - P.D. Blackmon AU - D.R. Pevear PY - 1984 DO - 10.3133/ofr82934 UR - https://pubs.usgs.gov/publication/ofr82934 ID - ofr82934 ER -