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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).