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1. Anadromous Stream Restoration Projects (Polygons): Russian River, California, 1981-2002

1981. Circuit Rider Productions. This polygon shapefile includes habitat improvement projects, research projects (surveys and studies of streams, roads, watersheds), education proj... Circuit Rider Productions.

2. District Boundaries of India, 1981

1981. ML InfoMap (Firm). This layer is a polygon theme representing district boundaries of India for 1981 and includes district socio-demographic Census attribute data such... ML InfoMap (Firm).

3. State Boundaries of India, 1981

1981. ML InfoMap (Firm). This layer is a polygon theme representing state boundaries of India for 1981 and includes socio-demographic Census attribute data such as total po... ML InfoMap (Firm).

4. District boundary of India, 1981

1981. ML InfoMap Pvt. Ltd. District boundary data of India, 1981. Includes socio-demographic data. ML InfoMap Pvt. Ltd.

5. India : District Boundaries, 1981

1981. ML InfoMap (Firm). India : District Boundaries, 1981 is a polygon theme representing district boundaries of India for 1981. Includes district socio-demographic Census... ML InfoMap Pvt. Ltd.

6. China county map, 1981

1981. All China Marketing Research Co., Ltd. Map of administrative divisions in China, at the county level and above, for the year 1981.