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Title
Welchie Matthias holding a matrix
Coverage (Spatial)
Las Animas County (Colorado, United States, North America) (civil)
Date
[1970s]
Contributor
Matthias, Welchie Henry, 1894-1978
Title
Matrix for the Colorado Coal project
Coverage (Spatial)
Colorado (United States, North America) (first order administrative divisions)
Date
[1970s]
Title
Colorado coal project plan
Coverage (Spatial)
Colorado (United States, North America) (first order administrative divisions)
Date
[1970s]
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