The construction of gamma-ray spectrometer calibration pads

Grasty, 1976, A calibration procedure for an airborne gamma-ray spectrometer, Geol. Surv. Can., Pap., 76 Grasty, 1979, Fields of view airborne gamma-ray detectors, Geophysics, 44, 1447, 10.1190/1.1441017 Gregory, 1961, A laboratory study of spectra at the surface of rocks, Dept. Mines Tech.-Surv., Ottawa, Mines Branch Rept, R 85 International Atomic Energy Agency, 1976, Radiometric reporting methods and calibration in uranium exploration, Intern. At. Energy Agency, Vienna, Tech. Rept. Ser., 174 International Atomic Energy Agency, 1979, Gamma-ray surveys in uranium exploration, Intern. At. Energy Agency, Vienna, Tech. Rept. Ser., 186 Kogan, 1969, Gamma spectrometry of natural — environments and formations, Israel Program Sci. Transl., 5778 Løvborg, 1976, Design of NaI (Tl) scintillation detectors for use in gamma-ray surveys of geological sources, 127 Peltoniemi, 1978, Lumen vesiarvon mittaus luonnon gammasäteilyn avulla, Vesitalous, 19, 17