1665-6423
1665-6423
S1665-64232017000200110
10.1016/j.jart.2017.01.004
Nigeria
Nigeria
Nigeria
00
00
2017
00
00
2017
15
2
110
121
[
2016
14
195-205
]
[
2009
30
2
2
267-76
]
[
2002
]
[
1985
]
[
1998
19
4
4
465-73
]
[
2012
54
3
3
243-51
]
[
2001
279
232-9
]
[
1989
]
[
2015
15
6
6
862-73
]
[
1992
313-38
]
[
2010
28
1
1
54-64
]
[
1999
]
[
2001
]
[
1992
]
[
NNPC
2015
]
[
2013
22
2
2
217-24
]
[
2004
22
5
5
665-75
]
[
2005
44
1139-49
]
[
1994
26-93
]
[
1994
4
26-93
]
[
2001
]
[
1991
6
3
3
334-8
]
[
2006
]
[
1993
157
1
1
]
[
2015
66
30-6
]
[
2013
4
3
3
53-63
]