TY  - RPRT
TI  - SUBMICROSCOPIC ( less than 1 mu m) MINERAL CONTENTS OF VITRINITES IN SELECTED BITUMINOUS COAL BEDS.
AU  - J.A. Minkin
AU  - E. C. T. Chao
AU  - C.L. Thompson
AU  - M.-V. Wandless
AU  - F.T. Dulong
AU  - R.R. Larson
AU  - S.G. Neuzil
PY  - 1983
UR  - https://pubs.usgs.gov/publication/70012025
ID  - 70012025
ER  -