Search Results
1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006. National Atlas of the United States. This polygon shapefile contains federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of... National Atlas of the United States.
1991. Powell, Susan and Navarro, Fernando. This line dataset represents the locations of irrigation canals in Mongolia in 1991. Irrigation canals are listed as a type of "nature protection m... UC Berkeley Library.
1991. Powell, Susan and Navarro, Fernando. This point dataset represents the locations of specific nature protection measures in place in Mongolia in 1991. The source map legend describes th... UC Berkeley Library.