TY  - RPRT
TI  - Analysis of soil reference materials PL-1 and BPGM-1 for the Polish Committee on Standardization Measures and Quality Control
AU  - S. A. Wilson
AU  - Paul H. Briggs
AU  - J. S. Mee
AU  - D. F. Siems
PY  - 1993
DO  - 10.3133/ofr93281
UR  - https://pubs.usgs.gov/publication/ofr93281
ID  - ofr93281
ER  -