TY  - RPRT
TI  - Additions and corrections for USGS bulletin 1623, Three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1
AU  - F.J. Flanagan
PY  - 1986
DO  - 10.3133/ofr86220
UR  - https://pubs.usgs.gov/publication/ofr86220
ID  - ofr86220
ER  -