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Pearsall Sitting On a Stage
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Pearsall Speaks in front of a Microphone
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Duane Pearsall with Arms Crossed
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U.S. Navy plane in Flying in the Clouds
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Duane D. Pearsall
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18. Saussure-Balmat monument 1887
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10. De Saussure's Ascent of Mont Blanc
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200 Jahre Besteigung des Mont-Blanc: currency and stamps
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Mlle d'Angeville en tenue d'ascension, 1838
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14. Henriette d'Angeville d'après une photographie faite à Lausanne
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