1. Spectral Radiance of Sky and Terrain at Wavelengths between 1 and 20 Microns I Instrumentation*
2. Spectral Radiance of Sky and Terrain at Wavelengths between 1 and 20 Microns II Sky Measurements*
3. McClatchey, R.A., R.W. Fenn, J.E.A. Selby. F.E. Volz. & J.S. Garing, AFCRL Report 72-0497.
4. Selby, J.E.A. & R.A. McClatchey, AFCRL Report 72-0745.
5. Elterman, L., AFCRL Environmental Res. Paper, 285, 68-0153.