Author
United States Bureau of Labor Statistics
89
Center for the Study of Material and Visual Cultures of Religion
87
Royal Geographical Society (Great Britain)
40
Weller, Edward, 1819-1884
27
National Safety Council
22
The Library of Chaim Potok (University of Pennsylvania)
21
United States International Trade Commission
20
United States Office of Education
20
Geological Survey (U.S.)
18
Great Britain Commercial Relations and Exports Department
13
National Education Association of the United States Research Division
13
Potok, Chaim
12
Inter American Geodetic Survey
10
Türkiye Bilimsel ve Teknik Araştırma Kurumu
9
Türkiye Bilimsel ve Teknik Dokümantasyon Merkezi
9
California Agency for Research in Education
8
California Teachers Association
8
Pennsylvania Department of Agriculture
8
Walcott, Charles D
8
Hawkins, George T
7
Markaz-i Āmār-i Īrān
7
Renshawe, John H
7
United States Bureau of Labor Standards
7
Makar, Ashley
6
Ohio State University Bureau of Business Research
6
Österreichische Akademie der Wissenschaften Mathematisch-Naturwissenschaftliche Klasse
6
Day & Son
5
International Labour Office
5
Iowa Bureau of Labor Statistics
5
Phillips, Frank M (Frank McGinley), 1874-
5
Promey, Sally M
5
Shirley Smith, Richard
5
United States Congress
5
W. & A.K. Johnston Limited
5
Aerospace Center (U.S.)
4
Bach, Carl Philipp Emanuel, 1714-1788
4
Bonner, Harrie Russell
4
Edward Stanford Ltd
4
Excerpta Medica Foundation
4
Great Britain Department of Health and Social Security
4
Harvard University Office of Career Services
4
Instituto Geográfico Nacional
4
International Labour Conference
4
Leape, Martha P
4
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716
4
President's Conference on Occupational Safety (Washington, D. C.)
4
Smith, George, Gent
4
Switzerland Eidgenössisches Statistisches Amt
4
Turner, W. J (William John)
4
United States Bureau of Mines
4
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