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[1]
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[2]
HELMBERG G, 1964, COMPOS MATH, V16, P72
[3]
HEWITT E, 1963, GRUNDLEHREN, V115
[4]
HLAWKA E, 1964, COMPOS MATH, V16, P83
[6]
SCOTT WR, 1964, GROUP THEORY
[7]
[No title captured]
[8]
[No title captured]