F. J. Flanagan

1915

• Additions and corrections for USGS bulletin 1623, three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1
• Descriptions and analyses of eight new USGS rock standards
• Descriptions and analyses of eight new USGS rock standards
• Reference samples in geology and geochemistry
• Three USGS mafic rock reference samples, W-2, DNC-1, and BIR-1
• USGS rock standards, III