Reference
- 1941 . “ American Society of Mechanical Engineers ” . In Test Code for Dust Separating Apparatus. Test Code 21 , 29 West 39th Street, New York, New York : American Society of Mechanical Engineers .
- Methods for Determination of Velocity, Volume, Dust and Mist Content of Gases. , Fourth Edition , California : Western Precipitation Corporation . Bulletin WP-50, 1016 W. Ninth Street, Los Angeles 15