Author
Feitz, Leland
7
Lindgren, Waldemar, 1860-1939
3
Ransome, F. L. 1868-1935
2
Sprague, Marshall
2
Bain, Harry Foster, 1872-1948
1
Beebe, A. H.
1
Blevins, Tim
1
Buckman, George F.
1
Clapp, Frederick G. 1879-1944
1
Colorado Springs Chamber of Commerce
1
Colorado. Office of State Auditor
1
EBSCOhost
1
Geological Survey (U.S.),
1
Hillebrand, W. F. 1853-1925
1
Jameson, Elizabeth
1
Johnson, Charles H.
1
Konselman, A. S.
1
Lindgren, Waldemar, 1860-1939,
1
Lynde, Francis, 1856-1930
1
Martin, G. C. 1875-1943
1
McKee, Ted
1
Munn, Bill
1
Nicholl, Chris
1
Otto, Calvin P., 1930-2009
1
Pikes Peak Library District. Special Collections
1
Pikes Peak Regional History Symposium
1
Porter, Rufus L., 1897-1979
1
Prindle, L. M. 1865-1956
1
Ransome, F. L. 1868-1935,
1
Russell, Israel C. 1852-1906
1
Sargent & Rohrabacher
1
United States. Soil Conservation Service
1
Warren, H. L. J.
1
Waters, Frank, 1902-1995
1