http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Area-time structure of the monthly precipitation process
by Vujica Yevjevich and Alan K. Karplus.
Sponsored by NSF, Grant GK-11564. Large continental droughts and Hydrology and Water Resources Program, Civil Engineering Department, Colorado State University.