1. Clinical significance of pulmonary function tests: disability or disinclination impairment or importuning.;Morgan;Chest,1979
2. Questionnaire reliability and validity in asbestos exposed workers.;Samet,1978
3. P1D: simple data description and data management BMPD Statistical Software;Toperek,1983
4. P2V: analysis of variance and covariance including repeated measures: BMPD Statistical Software;Jennrich,1983
5. Blood carbon monoxide levels in persons 3-74 years of age: United States, 1976-80.;Radford,1982