TY  - RPRT
TI  - Three USGS mafic rock references samples, W-2, DNC-1, and BIR-1
AU  - F.J. Flanagan
PY  - 1984
DO  - 10.3133/b1623
UR  - https://pubs.usgs.gov/publication/b1623
ID  - b1623
ER  -