U. S. Environmental Protection Agency
(1995)
\A Phase I Inventory of Current EPA Efforts to Protect Ecosystems. EPA841-S-95-001\
Washington, DC, USA.
Office of Water (4503F), United States Environmental Protection Agency.
U.S. Fish and Wildlife Service
(1995)
\Strategic plan for conservation of Fish and Wildlife Service trust resources in the Ohio River Valley ecosystem. USFWS Regions 5, 4, and 3\
Ohio River Valley Ecosystem Team.
U.S. Fish and Wildlife Service Division of Endangered Species
(1993).
"Endangered and Threatened Wildlife and Plants; Endangered Status for Eight Freshwater Mussels and Threatened Status for Three Freshwater Mussels in the Mobile River Drainage"
Federal Register, March 17, 1993
Uehlinger, U.,K.M. Wantzen,R. Leuven;H. Arndt
(2009).
"The Rhine River basin"
Tockner, K.;U. Uehlinger;C.T. Robinson (Ed.)
Rivers of Europe
(
pp. Pp 199-246
)
London, UK:
Academic Press.
UICN France,MNHN,SFI;ONEMA
(2010)
\La Liste rouge des espèces menacées en France - Chapitre Poissons d’eau douce de France métropolitaine\
Paris, France.
Ulziihutag, N.
(1989).
"Flora of Mongolia, Ulaanbaatar (in Mongolian)"
Unep
(1996)
\Groundwater: A threatened resource. UNEP Environment Library No. 15\
Nairobi, Kenya.
UNEP.
Unep
(1999).
"Regional overview of land-based sources and activities affecting the coastal environment and associated freshwater environment in the West and Central African region, Regional Seas Reports and Studies No. 171"
The Hague, Netherlands and Abidjan, Cote d'Ivoire:
UNEP/GPA Co-ordination Office and West and Central Africa Action Plan, Regional Coordinating Unit.
Unep
(2000)
\Environmental impact of refugees in Guinea\
Nairobi, Kenya.
UNEP, Regional office for Africa.
Unep
(2000)
\Global Environment Outlook 2000 - GEO-2000. UNEP's Millennium Report on the Environment\
London, UK.
Earthscan.
Unesco
(2001)
\UNESCO-MAB Biosphere Reserve Directory\
"<"http://www2.unesco.org/mab/br/brdir/directory/database.asp ">"
(2001)
United, N.
(2001)
\Report of the panel of experts on the illegal exploitation of natural resources and other forms of wealth of the Democratic Republic of Congo\
"<"http://www.un.org/Docs/sc/letters/2001/357e.pdf ">"
(2002)
United Nations Commission on Sustainable, D.
(1997)
\Natural resource aspects of sustainable development in Guinea-Bissau: desertification and drought\
"<"http://www.un.org/esa/agenda21/natlinfo/countr/guineab/natur.htm#desert ">"
(2001)
United Nations Commission on Sustainable, D.
(2002)
\Report of the World Summit on Sustainable Development: Johannesburg, South Africa 26 August - 4 September 2002\
New York, USA.
United Nations.
United Nations Educational Scientific and Cultural, Organization
(1999).
"Report of the 23rd session of the convention concerning the protection of the world cultural and natural heritage: World Heritage Committee, 29 November – 4 December 1999 in Marrakesh, Morocco"
Paris, France:
World Heritage.
United Nations Population, D.
(2001)
\World population prospects: Population database\
"<"http://esa.un.org/unpp/ ">"
(2002)
United States Geological, S.
(1996)
\First Detailed ‘Report Card’ on Mississippi River Shows Movement of Contaminants. Online. http://www.usgs.gov/public/press/public_affairs/press_releases/pr106m.html\
Unmack, P. J.
(1996).
"The unique Cooper Creek catfish from central Australia"
Fishes of Sahul10
pp. 460-464.
Unmack, P. J.
(2001).
"Biogeography of Australian freshwater fishes"
Journal of Biogeography28
(9)
pp. 1053-1089.
Unmack, P. J.
(2005).
"Historical biogeography and a priori hypotheses based on freshwater fishes"
Unpublished Thesis.
Arizona State University
.
Unpd
(1999).
"World population prospects: The 1998 revision, Vol. 1"
New York, New York:
United Nations.
Upper Mississippi River Conservation Committee (UMRCC)
(2000)
\A river that works and a working river: A strategy for the natural resources of the Upper Mississippi River System\
Rock Island, ILL.
Upper Mississippi River Conservation Committee.
Uschakov, P. V.
(1970).
"Observation sur la repartition de la faune benthique du littoral guinéen"
Cahier de biologie marineXI
pp. 435-457.
