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1
by Blumenthal, O., Courant, R., Hamel, G., Hecke, E.
Published 1922
Springer Berlin Heidelberg
Subjects: “...Mathematics, general...”
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2
by Klein, Felix
Published 1925
Springer Berlin Heidelberg
Subjects: “...Mathematics, general...”
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3
by Schouten, J. A.
Published 1924
Springer Berlin Heidelberg
Subjects: “...Mathematics, general...”