TY  - RPRT
TI  - An empirical determination of the minimum number of measurements needed to estimate the mean random vitrinite reflectance of disseminated organic matter
AU  - Charles E. Barker
AU  - Mark J. Pawlewicz
PY  - 1993
DO  - 10.1016/0146-6380(93)90050-l
UR  - https://pubs.usgs.gov/publication/70017362
ID  - 70017362
ER  -