DUONG, Ly Thuy; 						HUONG, Le Thi Thu.
 Aquamarine from Thach Khoan Mining Area in Phu Tho Province, Vietnam.
<strong>VNU Journal of Science: Earth and Environmental Sciences</strong>, [S.l.], v. 33, n. 2, june 2017.
ISSN 2588-1094.
Available at: &lt;<a href="https://js.vnu.edu.vn/EES/article/view/4090" target="_new">https://js.vnu.edu.vn/EES/article/view/4090</a>&gt;. Date accessed: 27 apr. 2024.
doi: <a href="https://doi.org/10.25073/2588-1094/vnuees.4090">https://doi.org/10.25073/2588-1094/vnuees.4090</a>.