978 resultados para FIELD SURVEY


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Survey organization: The Division of field studies, Institute of educational research, Teachers' college, Columbia university, George D. Strayer, director of survey. cf. p. [3].

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"Advance sheets--field operations of the Bureau of Soils, 1918"--Cover.

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"HWRIC project number 87-034."

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"Reprinted from the Report on field operations of the Bureau of Soils for 1901."

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[Advance sheets--Field Operations of the Bureau of Soils, 1904]