BIBLIOGRAPHY con't Standard Reference Methods for Source Testing 1972, Measurement of Emissions of Asbestos from Asbetos Mining and Milling Operations Air Pollution Control Directorate Environmental Protection Service, Report EPS-1-AP-75-1 January 1975 (draft only) t Comparison of Dust Sampling Instruments Mining Research Centre, Department of Energy, Mines and Resources Mines Branch, Ottawa Research Report R 250 Air Sampling Instruments 1967 - For Evaluation of Atmospheric Contaminats American Conference of Governmental Hygienists 1014 Broadway, Cincinnati, Ohio 45202