Preliminary measurements of natural radioactivity in the copper mine at Sin-Quyen LaoCai in North Vietnam / Duog van Hao, Magdalena GARGUL, Paweł JODŁOWSKI, Le Khanh Phon, NGUYEN DINH Chau, Natalia USHKO // W: Scientific-research cooperation between Vietnam and Poland : the first international conference : Krakow, Poland, 23–27 June 2014 : book of abstracts. — Kraków : Wydawnictwa AGH, 2014. — ISBN: 978-83-7464-699-4. — S. 121–123. — Tekst pol.-wietn.