Author
American Library Association
191
Library of Congress
154
Association of Research Libraries. Systems and Procedures Exchange Center
133
McMurtrie, Douglas C. (Douglas Crawford), 1888-1944
116
National Agricultural Library (U.S.)
97
United States. Superintendent of Documents
88
Library of Congress. Division of Bibliography
66
Griffin, Appleton P. C. (Appleton Prentiss Clark), 1852-1926
46
Gotham Book Mart Collection (University of Pennsylvania)
45
State Library of Pennsylvania
45
Library of Congress. Manuscript Division
44
National Library of Medicine (U.S.)
44
Association of Research Libraries. Office of Leadership and Management Services
38
Library of Congress. Network Development and MARC Standards Office
36
Library of Congress. Cataloging Policy and Support Office
35
Library of Congress. National Library Service for the Blind and Physically Handicapped
31
New York Public Library
31
Pennsylvania State Library
31
Library of Congress. Policy and Standards Division
27
United States. Office of Education
27
United States. National Technical Information Service
26
Meyer, Herman H. B. (Herman Henry Bernard), 1864-1937
25
National Center for Education Statistics
25
Dewey, Melvil, 1851-1931
23
Association of Research Libraries. Office of Management Services
22
Library of Congress. Cataloging Distribution Service
22
Special Libraries Association
22
Unesco
21
United States. Bureau of the Census
21
United States. National Commission on Libraries and Information Science
21
National Library of Medicine (U.S.). Reference Section
20
Downs, Robert B. (Robert Bingham), 1903-1991
19
Geological Survey (U.S.)
19
Horace Howard Furness Memorial Library (University of Pennsylvania)
19
Bibliographical Society (Great Britain)
18
Canadian Library Association
17
National Cancer Institute (U.S.)
17
Pforzheimer Bruce Rogers Collection (Library of Congress)
17
Library of Congress. Center for the Book
16
Library of Congress. Subject Cataloging Division
16
National Institute of Mental Health (U.S.)
16
United States. Department of Health, Education, and Welfare
16
Frank and Virginia Williams Collection of Lincolniana (Mississippi State University. Libraries)
15
International Cancer Research Data Bank
15
Lessing J. Rosenwald Reference Collection (Library of Congress)
15
Library Association
15
Library of Congress. Copyright Office
15
National Clearinghouse for Mental Health Information (U.S.)
15
Pennsylvania Historical and Museum Commission
15
Tompkins, Dorothy C. (Dorothy Campbell), 1908-1988
15
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