by
Stallard, Alvis H.
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Aerial photography in soil surveys.
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National Research Council (U.S.). Highway Research Board. Committee on Surveying, Mapping and Classification of Soils.
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Books
Excerpt:
Aerial photography in soil surveys.
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by
National Research Council (U.S.). Highway Research Board.
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Books
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Aerial photography in soil surveys -- United States -- Congresses.
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