1. Sänger, Eugen; and Bredt, Irene:
Über einen Raketenantrieb für Fernbomber.
Deutsche Luftfahrtforschung U93538, 1944.
(Translation CGD-32, Tech. Info. Branch, Bur. Aero.., Navy Department.)

2. Becker., John V.:
The X-15 Project - Origins and Research Background.
Astronautics and Aerospace Engineering, Feb. 1964.

3. Dryden, Hugh L.:
Toward the New Horizons of Tomorrow.
First von Karman Lecture, Astronautics, Jan. 1963.

4. Beeler, D. E.:
The X-15 Research Program.
AGARD Rept. 289, NATO, Paris, October 1960.

5. Weil, Joseph:
Review of the X-15 Program.NASA TN D-1278, 1962.

6. Toll, T. A. I., and Fischel, J.:
The X-15 Project - Results and New Research.
Astronautics and Aerospace Engineering, March 1964.

7. Walker, J. A.; and Weil, J.:
The X-15 Program Proceedings, Second Manned Space Flight Meeting,
Co-sponsored by AIAA and NASA,
April 22-24, 1963, Dallas, Texas.

8. Holleman, E. C.:
Piloting Performance During Boost of the X-15 Airplane to High Altitude.
NASA TN D-2289, April 1964.

9. Holleman, E. C.:
Control Experiences of the X-15 Pertinent to Lifting Entry.
NASA TN D-3262, February 1966.

10. Knight, W. J.:
Increased Piloting Tasks and Performance of the X-15-2 in Hypersonic Flight.
The Aeronautical Journal, Sept. 1968.

11. Keener, E. R.; and Pembro, C.:
Aerodynamic Forces on Components of the X-15 Airplane.
NASA TM X-712, 1962.

12. Walker,H. J.; and Wolowicz, C. H.:
Stability and Control Derivative Characteristics of the X-15 Airplane.
NASA TM X-714, 1962.

13. Yancey, R. B.:
Flight Measurements of Stability and Control Derivatives
of the X-15 Research Airplane to a Mach Number of 6.02
and an Angle of Attack of 25.
NASA TN D-2532, November 1964.

14. Pyle, J. S.:
Flight Pressure Distributions on the Vertical Stabilizers
and Speed Brakes of the X-1.5 Airplane at Mach Numbers from 1 to 6.
NASA TN D-3o48, October 1965.
(See also, same author, TN D-2241 (fuselage pressures),
and TN D-2602 (wing pressures)..)

15. Braslow, A. L.:
Analyses of Boundary Layer Transition on X-15-2 Research Airplane.
NASA TN D-3487, July 1966.

16. Banner, R. D.; Kuhl; A. E.; and Quinn, R. D.:
Preliminary Results of Aerodynamic Heating Studies on the X-1.5 Airplane.
NASA TK x-638, March 1962.

17. van Driest., E. R.:
The Problem of Aerodynamic Heating.
Aero. Engr. Review, Vol. 15, No. 10, October 1956, pp. 26-41.

18. Eckert, E. R. G.:
Survey of Boundary Layer Heat Transfer at
High Velocities and High Temperatures.
WADC TR 59-624, Wright Air Development Center, USAF, April 1960
(available from ASTIA as AD-238292).

19. Bertram, M. H.; Cary, A. M., Jr.; and Whitehead, A. H. Jr.:
Experiments with Hypersonic Turbulent Boundary layers on Flat Plates and Delta Wings.
Presented at AGARD Specialists Mtg. on Hypersonic Boundary Layers and Flow Fields,
May 1-3, 1968, Lcndon, England.

20. Jordan, G. H.; McLeod, N. J.; and Guy, L. D.:
Structural Dynamic Experiences of the X-15 Airplane.
NASA TN D-1158, 1962.

21. Row, P. V.; and Fischel, J.:
X-15 Flight Test Experience.
Astronautics and Aerospace Engineering, June-1963.

Previous Index