R. Sipayung
发表
Y. Hasanah,
L. Mawarni,
H. Hanum,
2021,
IOP Conference Series: Earth and Environmental Science.
E. Purba,
R. Sipayung,
L. Lubis,
2013
.
R. I. Damanik,
R. Sipayung,
L. Lumbangaol,
2019,
IOP Conference Series: Earth and Environmental Science.
R. Sipayung,
I. Elizar,
M. Sinuraya,
2018,
Journal of Physics: Conference Series.
R. Sipayung,
M. Sinuraya,
D. S. Hanafiah,
2020,
IOP Conference Series: Earth and Environmental Science.
R. Sipayung,
N. Rahmawati,
Fadli Azhari Harahap,
2014
.
R. Sipayung,
R. R. Lahay,
S. Misrun,
2018
.
T. Sabrina,
R. Sipayung,
R. R. Lahay,
2019,
IOP Conference Series: Earth and Environmental Science.
Y. Hasanah,
L. Mawarni,
H. Hanum,
2021
.