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2. Effect of screens in wide-angle diffusers;Schubauer;National Advisory Committee for Aeronautics, TN No 1610,1948
3. The aerodynamic design of blower tunnels with wide-angle diffusers;Mehta;Prog. Aerospace Sci.,1977
4. EP2. Industrial Gas Cleaning Institute Specifications, USA,1973
5. Reynolds, A. J. and Page, J. R. Unpublished work, 1980