determination method: SHA-1 described at URL: https://svs.gsfc.nasa.gov/14519 URL: https://svs.gsfc.nasa.gov/vis/a010000/a014500/a014519/Slide1.jpg determination
determination method: SHA-1 described at URL: https://svs.gsfc.nasa.gov/14175 URL: https://svs.gsfc.nasa.gov/vis/a010000/a014100/a014175/Slide1.png determination
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