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CBT QA
Access to CBT QA files - Requires password
CFL spectra
Christmas letter 2010
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PRINCE2 CBT KB
Solar Cycle 24
Some basic graphs for the progression of solar cycles 23 and 24, updated approx. monthly.
Spectroscope
The visible spectrum
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The visible spectrum
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CFL spectra
PRINCE2 CBT KB
Christmas letter 2010
CBT QA
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Copyright Peter Hers Consulting 2010. All Rights Reserved.