http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
This book has to emphasize engineering design of soil and water conservation practices and their impact on the environment, primarily air and water quality.
Soil conservation,Water conservation,Agricultural engineering,Kỹ thuật nông nghiệp,Thuỷ nông