Additions and corrections for USGS bulletin 1623, three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1

Additions and corrections for USGS bulletin 1623, three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1

by F. J. Flanagan

Part of Open-file report -- 86-220

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