North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development & Perkins, C. D. (1959). Flight test manual: General editor: C.D.Perkins. Pub. for and on behalf of AGARD (2nd ed.). Pergamon Press.

North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and Courtland D. Perkins. Flight Test Manual: General Editor: C.D.Perkins. Pub. for and on Behalf of AGARD. 2nd ed. N.Y.: Pergamon Press, 1959.

North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and Courtland D. Perkins. Flight Test Manual: General Editor: C.D.Perkins. Pub. for and on Behalf of AGARD. 2nd ed. Pergamon Press, 1959.