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R. A. Christiansen
R. A. Christiansen
Mathematics
Algebra
Fishing
Recreation
Discrete mathematics
4
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2024
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Vacation characteristics and recreation interests at 90 Wisconsin resorts in 1967.
1970
A. C. Johnson
R. A. Christiansen
H. A. Johnson
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Some economic aspects of American plan resorts in Wisconsin, 1967.
1970
R. A. Christiansen
D. Staniforth
H. A. Johnson
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Recurrent transformation groups
1969
Canadian Journal of Mathematics
R. A. Christiansen
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Elementary Problems: E2133-E2140
1968
American Mathematical Monthly
H. D. Ruderman
Harley Flanders
F. A. Butter
A. Inselberg
B. Dimsdale
R. A. Christiansen
R. S. Luthar
Stanley Rabinowitz
H. Guggenheimer
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