Indeksy

• United Nations Environment Programme, 4
• United Nations International Strategy for Disaster Reduction, 1
• United Nations University Press, 2
• United Nations University. Institute for Environment and Human Security, 1
• United Nations, 2
• United Nations. International Strategy for Disaster Reduction, 1
• United Publishers & Productions, 1
• United States Atomic Energy Commission, 2
• Universitätsverlag, 1
• Universite Europeenne, 1
• University of Arizona Press, 1
• University of Bucharest. Faculty of Mathematics, 1
• University of California Division of Agricultural Sciences, 1
• University of California Press, 1
• University of Exeter Press, 1
• University of Insurance & Banking, 2
• University of Leicester 2
• University of Maryland, 4
• University of North Carolina at Chapel Hill, 1
• University of Siedlce, 1