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Report on Fourth International Congress of Soil Science, Amsterdam, July 24 - August 1, 1950
Roy Douglas Hockensmith
其他書名
Post-congress Excursion Through the Netherlands and Belgium, August 2-19, 1950 : and Field Trip in France, England, and Scotland, August 20-30, 1950
出版1950
URLhttp://books.google.com.hk/books?id=BKQUtwAACAAJ&hl=&source=gbs_api