Simple method of estimating severity of pulmonary fibrosis on a numerical scale.

Beattie J, Knox JF. Studies of mineral content and particle size distribution in the lungs of asbestos textile workers. In: Davies CN, ed. Inhaledparticles and vapours. London: Pergamon Press, 1961:419-33.

Report and recommendations of the UICC working group on asbestos and cancer. Ann NY Acad Sci 1965;132:715-6.

Hinson KFW, Otto H, Webster I, Rossiter CE. Criteria for the diagnosis and grading of asbestosis. In Bogovski P, ed. Biological effects of asbestos. Lyon, France: World Health Organisation, 1973:54-7.

Craighead JE, Abraham L, Churg A, et al. Asbestos associated diseases. Arch Pathol Lab Med 1982;106:592-3.

Winer BJ. Statistical principles in experimental design. New York: McGraw-Hill, 1971:286.