1. AGRS (1991) Airborne gamma ray spectrometer surveying, Technical reports series No. 323, International Atomic Energy Agency, Vienna.
2. Bristow, Q. (1979) Gamma ray spectrometric methods in Uranium exploration–Airborne Instrumentation. Geol. Surv. Canada Paper 135–146.
3. Grasty, R.L. (1979) Gamma ray spectrometric methods in uranium exploration–Theory and operational procedures. Geol. Surv. Canada Paper 147–161.
4. Grasty, R.L., Holman, P.B. and Blanchard, Y.B. (1991) Transportable calibration pads for ground and airborne gamma-ray spectrometers. Geol. Surv. Canada Paper 90–23.
5. Grasty, R.L. and Minty, B.R.S. (1995) The standardization of airborne gammaray surveys in Australia. Exploration Geophysics. v.26, pp.276–283.