Manuscripts
Lake Mead in lower Grand Canyon near the end of the Pre-Cambrian [on photo reverse: Below Separation Canyon]
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The "Wen"/"Joan" in the Pre-Cambrian section of the Grand Canyon? Probably below Bright Angel Creek
Manuscripts
mssMarston papers V149/0056
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Margaret Marston. Grand Canyon. Spring Canyon? [photo reverse: taken below Havasu]
Manuscripts
mssMarston papers V161/0064
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