http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
China, multiple cropping and related crop production technology
report on an FAO/UNDP study tour to the People's Republic of China, 25 June-22 July 1979
Food and Agriculture Organization of the United Nations
FAO plant production and protection papers ; 22