Torsion free groups of rank two/
Beaumont, Ross A. 1914-
Torsion free groups of rank two/ by R. A. Beaumont and R. S. Pierce. - Providence, R.I.: American Mathematical Society, 1961. - 41 p.; 25 cm. - Memoirs of the American Mathematical Society; no. 38. . - Memoirs of the American Mathematical Society; no. 38. .
Group theory.
Torsion free groups of rank two/ by R. A. Beaumont and R. S. Pierce. - Providence, R.I.: American Mathematical Society, 1961. - 41 p.; 25 cm. - Memoirs of the American Mathematical Society; no. 38. . - Memoirs of the American Mathematical Society; no. 38. .
Group theory.