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431. Vernal Pools: Holland's Central Valley, Russian River Basin, California, 1998

1999. Circuit Rider Productions. This polygon shapefile was derived from the U.S. Fish and Wildlife Service and California Department of Fish and Game's Holland's Central Valley Ve... Circuit Rider Productions.

432. Virginia Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Virginia Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Virginia. Environmental Systems Research Institute, Inc. (ESRI).

433. Washington Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Washington Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Washington. Environmental Systems Research Institute, Inc. (ESRI).

434. Water Data Storage and Retrieval System Daily Value Summaries: Russian River Basin, California, 2000-2002

1999. Circuit Rider Productions. This shapefile is a point representation of observations contained in the USGS WATSTORE Daily Values file, as well as remarks and other data from U... Circuit Rider Productions.

435. Waterbody Reach: Russian River Basin, California, 1999-2002

1999. Circuit Rider Productions. The polygon features were selected based on their spatial location within the extent of the Russian River basin and contains reach codes for networ... Circuit Rider Productions.

436. West Virginia Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). West Virginia Major Roads represents interstate, U.S., and state highways and other major thoroughfares within West Virginia. Environmental Systems Research Institute, Inc. (ESRI).

437. Wisconsin Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Wisconsin Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Wisconsin. Environmental Systems Research Institute, Inc. (ESRI).

438. World Wildlife Fund Ecoregions, 2000

1999. World Wildlife Fund and Environmental Systems Research Institute, Inc. (ESRI). World Wildlife Fund Ecoregions represents global terrestrial and freshwater ecoregions defined as relatively large areas of land or water in the wo... Environmental Systems Research Institute, Inc. (ESRI).

439. Wyoming Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Wyoming Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Wyoming. Environmental Systems Research Institute, Inc. (ESRI).