http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
proceedings of the Tokyo symposium September 1969. Affaissement du sol; actes du colloque de Tokyo Septembre 1969
International Symposium on Land Subsidence (1969 : Tokyo)
International Association of Scientific Hydrology
"A contribution to the International hydrological decade."