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From the letter-files of S.W. Johnson, professor of agricultural chemistry in Yale University, 1856-1896, director of the Connecticut Agricultural Experiment Station, 1877-1900 edited by his daughter, Elizabeth A. Osborne.

Forstliche Bodenkunde und Standortslehre

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  Author(s): Liebig, Justus ,  Blyth, John
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  Author(s): Judeich, Johann Friedrich