Não informado. Techniques of Water Resources Investigations of the United States Geological Survey.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Techniques of Water Resources Investigations of the United States Geological Survey.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Techniques of Water Resources Investigations of the United States Geological Survey.
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