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Photo Researchers
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M. I. Walker
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Omikron
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Photo Researchers, Inc.
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Photo Researchers
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Science Source
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David R Frazier and Photo Researchers
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Photo Researchers, Inc.
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Photo Researchers, Inc.
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Science Source
Frederick Grant Banting, Canadian
Science Source
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NASA Science Source
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Photo Researchers, Inc.
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Science Source
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M. I. Walker
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Alan Carey
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Art Wolfe
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Biophoto Associates
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Ikon Ikon Images
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Ikon Images
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David Hosking
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Science Source
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James Zipp
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Hans Reinhard
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William H Mullins
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Nhpa
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Ted Kinsman
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Photo Researchers
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Jean-Louis Klein and Marie-Luce Hubert
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James Steinberg
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Jean-Louis Klein and Marie-Luce Hubert
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Takeshi Takahara
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Alison Wright
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Hermann Eisenbeiss and Photo Researchers
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James Steinberg and Photo Researchers
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Science Source
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L Newman and A Flowers and Photo Researchers
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Photo Researchers, Inc.
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Photo Researchers, Inc.
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Photo Researchers, Inc.
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Photo Researchers, Inc.
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Eric V. Grave
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Photo Researchers, Inc.
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Science Source
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Photo Researchers, Inc.
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Photo Researchers, Inc.