1. 1946 Manual of Anatomy, 7th Ed., pp. 396-397. Bailliere, Tindall and Cox, London.
2. 1948 Method of Anatomy, 4th Ed., pp. 81-82. Bailliere, Tindall and Cox, London.
3. 1946 Anatomy, 29th English Ed., pp. 603-604. Longman's Green and Co., London.
4. 1948 Anatomy, 25th American Ed., pp. 429-430. Lea and Febiger, Philadelphia.