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rio grande county

Determination of instream metal loads using tracer-injection and synoptic-sampling techniques, Wightman Fork, southwestern Colorado, July 1999

By Roderick F. Ortiz

Determination of instream metal loads using tracer-injection and synoptic-sampling techniques in Wightman Fork, southwestern Colorado, September 1997

By Roderick F. Ortiz

Soil survey of Rio Grande County area, Colorado

By Pannell, James P.

Early history of Mineral and Rio Grande Counties, Colorado

By Bev Van Horn

The families of Los Valdeses

By Maria S. Martinez

1978 census of agriculture, preliminary report, Rio Grande County, Colo

By United States. Bureau of the Census

Rio Grande County Colorado Marriage Index 1899-1938

By Patrick Vernon Murray,Dixie Owens Murray