References
- Industrial Ventilation—a Manual of Recommended Practice, 20th ed . Cincinnati, OH : American Conference of Governmental Industrial Hygienists .
- Ower , E. and Pankhurst , R. C. 1977 . The Measurement of Air Flow, 5th ed Oxford, , Great Britain : Pergammon Press .
- Air-Moving and Conveying Association, Inc. 1967 . AMCA Standard 210-67. 205 60068 Park Ridge, IL : Toughy Ave. .