W. Stephens
发表
G. Spoor,
P. Martin,
C. Souch,
2004,
Plant and Soil.
Peter J. Martin,
W. Stephens,
2006,
Bioresource technology.
Robin Matthews,
R. Matthews,
W. Stephens,
2002
.
M. Carr,
W. Stephens,
C. Othieno,
1992
.
P. Burgess,
M. Carr,
W. Stephens,
1993,
Experimental Agriculture.
J. Knox,
T. Hess,
W. Stephens,
2001
.
R. Matthews,
W. Stephens,
T. Middleton,
2002
.
Tim Hess,
Robin Matthews,
Anil Graves,
2002
.
T. Hess,
A. Graves,
R. Matthews,
2000
.
Tim Hess,
Robin Matthews,
Anil Graves,
2002
.
W. Ng'etich,
W. Stephens,
W. Ng’etich,
2001,
Experimental Agriculture.
W. Stephens,
W. Ng’etich,
2001,
Experimental Agriculture.
M. Carr,
W. Stephens,
1989,
Experimental Agriculture.
M. Carr,
W. Stephens,
T. Congdon,
1988
.
Peter J. Martin,
W. Stephens,
2006,
Bioresource technology.
D. J. Nixon,
S. Tyrrel,
W. Stephens,
2001,
Bioresource technology.
S. Tyrrel,
W. Stephens,
J. Tiberghien,
2000
.
D. G. Christian,
S. Tyrrel,
M. Bullard,
2001
.
S. Tyrrel,
W. Stephens,
C. Durr,
1997
.
Peter J. Martin,
W. Stephens,
2008,
Bioresource technology.
D. G. Christian,
J. Knox,
T. Hess,
2001
.
M. Carr,
W. Stephens,
1991,
Experimental Agriculture.
W. Stephens,
W. Ng’etich,
Caleb O. Othieno,
2001,
Experimental Agriculture.
M. Carr,
W. Stephens,
C. Othieno,
1992
.
T. Hess,
W. Stephens,
U. M. Maryah,
1995
.
R. Matthews,
W. Stephens,
1998,
Experimental Agriculture.
R. Panda,
R. Matthews,
W. Stephens,
2003,
Experimental Agriculture.
Tim Hess,
W. Stephens,
Robin Matthews,
2002
.
Robin Matthews,
R. Matthews,
W. Stephens,
1998,
Experimental Agriculture.
Robin Matthews,
R. Matthews,
W. Stephens,
1998,
Experimental Agriculture.
M. Carr,
W. Stephens,
1994,
Experimental Agriculture.
M. Carr,
W. Stephens,
1993,
Experimental Agriculture.
M. Carr,
W. Stephens,
1991,
Experimental Agriculture.
M. Carr,
W. Stephens,
1990,
Experimental Agriculture.
M. Carr,
W. Stephens,
M. Dale,
1987,
Experimental Agriculture.
M. Carr,
W. Stephens,
1992
.
G. Thomas,
T. Hess,
W. Stephens,
1996
.
C. Souch,
W. Stephens,
1998,
Tree physiology.
Tim Hess,
William Stephens,
T. Hess,
1999
.
W. Stephens,
1990
.
W. Stephens,
T. Middleton,
Robin Matthews,
2002
.
R. Matthews,
W. Stephens,
2002
.
P. Martin,
M. Bullard,
J. D. Knight,
2001
.