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Mineral/References

USGS Volcano Hazards Program -- Reducing volcanic risk
http://volcanoes.usgs.gov/Products/Pglossary/mineral
(Citation of USGS material is requested, not required)

See also : Mineral



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Robert Koch

... staining and purification techniques, and bacterial growth media, including agar plates and the Petri dish (named after R.J. Petri), both of which are still used today. ...