http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Input format guidelines for world radiometric network data
Glavnai︠a︡ geofizicheskai︠a︡ observatorii︠a︡ im. A.I. Voeĭkova
prepared by [M.O. Krichak], World Radiation Data Centre, Voeikove Main Geophysical Observatory, USSR State Committee for Hydrometeorology, Leningrad, 1987.