Low-speed aerodynamic characteristics of NACA 0012 aerofoil section, including the effects of upper-surface roughness simulating hoar frost.
Gregory, N.,author.
O'Reilly, C. L.,author.
Great Britain.Ministry of Defence,issuing body.
Great Britain.Her Majesty's Stationery Office.
Aeronautical Research Council (Great Britain)
January 1970.