Holzhauser, Curt A.
naca-rm-a57k01
1958
Lift, drag, and pitching-moment coefficents were measured on a straight-wing model that had a full-span leading-edge flap and a partial-span trailing-edge flap, each with porous area at the knee.
An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1958/naca-rm-a57k01.pdf