Okey Francis Obi
发表
Jn Nwakaire,
Okey Francis Obi,
O. Obi,
2014
.
Okey Francis Obi,
Jeremiah C. Ezema,
Wilfred Ifeanyi Okonkwo,
2020
.
Okey Francis Obi,
2016,
Ergonomics.
Rien Visser,
Okey Francis Obi,
2017
.
Rien Visser,
Okey Francis Obi,
R. Visser,
2017
.
Jn Nwakaire,
Okey Francis Obi,
Bo Ugwuishiwu,
2013
.
Okey Francis Obi,
Rien Visser,
R. Visser,
2021
.
Okey Francis Obi,
Rien Visser,
R. Visser,
2020,
European Journal of Forest Engineering.
Okey Francis Obi,
S. L. Ezeoha,
O. Obi,
2016
.