1) Population trends in Colorado 1860 to 1930: a historical perspective for agricultural, industrial, and human planning

Author
Roskelley, R. W
Series
Bulletin volume 462
Publisher
Colorado State College, Colorado Experiment Station
Pub. Date
1940.
Language
English

2) Colorado's farm and ranch population, January 1, 1939

Author
Roskelley, R. W
Publisher
Colorado Experiment Station
Pub. Date
1939.
Language
English

3) Educational foundations for rural rehabilitation

Author
Roskelley, R. W
Series
Bulletin volume 457
Publisher
Colorado State College, Colorado Experiment Station
Pub. Date
1939.
Language
English