PHUC, Nguyen Van.
Ordovician - Silurian and Lower Devonian Graptolite Bearing Beds from Vietnam.
VNU Journal of Science: Natural Sciences and Technology, [S.l.], v. 18, n. 1, mar. 2002.
ISSN 2588-1140.
Available at: <
https://js.vnu.edu.vn/NST/article/view/3089>. Date accessed: 23 nov. 2024.
