Author
Geological Survey (U.S.)
1,195
Illinois State Geological Survey
588
Rand McNally and Company
457
United States Bureau of the Census
437
Art Institute of Chicago
365
Illinois
319
Federal Financial Institutions Examination Council (U.S.)
231
University of Illinois at Urbana-Champaign Agricultural Experiment Station
223
McLellan Lincoln Collection (Brown University)
197
Harris Collection of American Poetry and Plays (Brown University) Broadsides
181
United States Soil Conservation Service
171
Gotham Book Mart Collection (University of Pennsylvania)
163
St. Martin's Press/Tor Archive (Brown University)
162
De Gruyter
156
United States Bureau of Labor Statistics
145
United States Congress
144
Allen, Howard E
137
United States
134
Sears, Roebuck and Company
129
H.M. Gousha Company
123
Northeastern Illinois Metropolitan Area Planning Commission
122
University of Chicago Library
122
Illinois Division of Highways
114
Archives of Czechs and Slovaks Abroad
111
Portland Cement Association
110
Illinois Supreme Court
105
United States Natural Resources Conservation Service
100
Bargh, Margaret H
99
Illinois Department of Transportation
99
Adam Matthew Digital (Firm)
98
Illinois Central Railroad Company
96
Illinois Office of Secretary of State
96
Rockford Map Publishers
95
Chicago Historical Society
94
ebrary, Inc
92
Warner Home Video (Firm)
91
Northeastern Illinois Planning Commission
90
Noehre, Allen W
89
W.W. Hixson & Co
86
University of Chicago Social Science Research Committee
79
World's Columbian Exposition
79
Kartemquin Films
78
Illinois State Historical Library
76
Newberry Library
73
University of Chicago
72
Lincoln, Abraham, 1809-1865
70
Chicago Plan Commission
69
Illinois State Library
69
Sallie Bingham Center for Women's History and Culture
68
Illinois General Assembly
67
more ...