Author
National Council of Teachers of Mathematics
6
Association of Teachers of Mathematics
4
Mathematical Association of America
4
Society for Industrial and Applied Mathematics
3
International Association for Mathematical Geology
2
Mathematical Association
2
Akademii͡a nauk SSSR. Quantum Bureau
1
American Association of Physics Teachers
1
Applied Probability Trust
1
Association of Teachers of Mathematics in the Middle States and Maryland
1
Australian Mathematical Society
1
Australian National University. Department of Mathematics
1
Calcutta Mathematical Society
1
Cambridge Philosophical Society
1
Canadian Mathematical Congress
1
Canadian Mathematical Congress (Society)
1
Canadian Mathematical Society
1
Consortium for Mathematics and Its Applications (U.S.)
1
Cornell University. Library
1
Československá akademie věd. Matematický ústav
1
Duke University Press
1
ERIC Clearinghouse for Science, Mathematics, and Environmental Education
1
East Carolina University
1
Hindawi Publishing Corporation
1
Nagoya Daigaku. Sūgaku Kyōshitsu
1
National Institute of Education (U.S.)
1
National Science Teachers Association
1
Nihon Gakushiin
1
Project Euclid
1
Rose-Hulman Institute of Technology
1
Rossiĭskai͡a akademii͡a nauk. Quantum Bureau
1
Royal Society of Edinburgh
1
University of Central Florida
1
Zhongguo ke xue yuan. Shu xue yan jiu suo
1
Zhongguo shu xue hui
1