1. The Metallurgist December, 1935 10 91
2. W. Hessenbruch Beryllium Beryllium Alloys Metallwirtschaft May 20th, 1938 17 541
3. C. B. Sawyer B. R. Kjellgren Industrial and Eng. Chem. May, 1938 30 501
4. Metallwirtschaft 1937 16 419
5. J. B. Johnson Metals and Alloys April, 1938 9 94