Beaumont, R.A Pierce, R.S
Torsion free groups of rank two - Rhode Island American Mathematical Society 1961 - 41 - Memoirs of the American Mathematical Society ; 00038 .
B27 K1
512.54 BEA
Torsion free groups of rank two - Rhode Island American Mathematical Society 1961 - 41 - Memoirs of the American Mathematical Society ; 00038 .
B27 K1
512.54 BEA