H. F. Utley
- Dust collecting system. Dans: Materiales de Construccion, v. 2, n. 27 (janvier 1952). (1952):
- Columbia gypsum products speeds completion of spokane plant. Dans: Materiales de Construccion, n. 18 (novembre 1950). (1950):
- Lehigh's metaline falls output doubled by modornization program. Dans: Materiales de Construccion, n. 17 (octobre 1950). (1950):