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21. Provincial Boundaries: China, 1990

1990. China. Guo jia tong ji ju, Beijing Hua tong ren shi chang xin xi you xian ze ren gong si, Zhonghua di tu xue she, and University of Michigan. China Data Center. This polygon dataset represents provincial boundaries in China from 1990. These data were primarily based on the "The Administrative Maps of the Pe... University of Michigan. China Data Center.

22. Tibet County Boundary and Census Data (Part A), 1990

1990. University of Michigan. China Data Center. Tibet County Boundary and Census Data (Part A), 1990 is a polygon theme representing counties in China in the year 1990. Attribute information inc... All China Marketing Research Co.

23. Tibet County Boundary and Census Data (Part B), 1990

1990. University of Michigan. China Data Center. Tibet County Boundary and Census Data (Part B), 1990 is a polygon theme representing counties in Tibet in the year 1990. Attribute information inc... All China Marketing Research Co.

24. Tibet Province Boundary, 1990

1990. University of Michigan. China Data Center. Tibet 1990 Province Boundary is a polygon theme representing Tibet province in china in the year 1990. All China Marketing Research Co.

25. United States Lakes (Generalized), 1990-1992

1990. Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the major lakes within the United States at 1:5,000,000 scale. This layer is part of the 2014 ESRI Data and Maps ... Environmental Systems Research Institute (Redlands, Calif.).

26. Vineyards: Russian River Basin, California, 1990-1997

1990. Circuit Rider Productions. This polygon shapefile describes the 1990/1997 vineyard and appellation boundaries of Sonoma County. The data was developed from Sonoma County Plan... Circuit Rider Productions.