1. A Statement of the Problem and the State of the Art;Hatch,1964
2. The Health of Workers in Dusty Trades. II. Exposure to Siliceous dust (Granite Industry);Russell;Public Health Bulletin,1929
3. The Health of Workers in Dusty Trades. VII. Restudy of a Group of Granite Workers;Russell;Public Health Bulletin,1941
4. J. J. Bloomfield, Personal correspondence, 23 Jan. 1973.