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Changes in the Composition of the Loess Soils of Nebraska Caused by Cultivation
A. L. Haecker
Edward Gerrard Montgomery
Edwin Mead Wilcox
Frederick James Alway
Howard Remus Smith
University of Nebraska (Lincoln campus). Agricultural Experiment Station
W. P. Snyder
William Wesley Burr
E. K. Files
E. M. Little
Nelle Stevenson
Reuben Marion Pinckney
出版
University of Nebraska, Agricultural Experiment Station of Nebraska
, 1910
URL
http://books.google.com.hk/books?id=rRSuAQAACAAJ&hl=&source=gbs_api