SØRENSEN, I. Progress in calibrating an X-ray spectrometer. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 80, p. 149–150, 1976. DOI: 10.34194/rapggu.v80.7509. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/7509. Acesso em: 3 jul. 2024.