Profiles in the History of the U.S. Soil Surveyby Douglas Helms; Anne B. W. Effland
Review by: Philip L. FranaТом:
77
Мова:
english
Журнал:
Agricultural History
DOI:
10.2307/3744945
Date:
January, 2003
Файл:
PDF, 280 KB
english, 2003