A Comparison of Bismuth Germanate, Cesium Iodide and Sodium Iodide Scintillation Detectors For Gamma Ray Spectral Logging in
Small Diameter Boreholes; Conaway, J G; Hyatt, W G; Killeen, P G; in,
Current Research Part B / Recherches en cours Partie
B. Geological Survey of Canada, Paper no. 80-1B, 1980 p. 173-177,
https://doi.org/10.4095/102143 
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