Roy Hartfield
发表
Christopher J. Roy,
C. J. Roy,
Josh Doyle,
2006
.
Mark Carpenter,
Roy Hartfield,
2018
.
Vivek Ahuja,
Roy Hartfield,
R. Hartfield,
2015
.
Christoph Burger,
Roy Hartfield,
R. Hartfield,
2007
.
Vivek Ahuja,
Roy Hartfield,
R. Hartfield,
2009
.
Roy Hartfield,
Timothy W. Ledlow,
R. Hartfield,
2014
.
John E. Burkhalter,
Vivek Ahuja,
Roy Hartfield,
2010
.
Sushil Bhavnani,
Roy Hartfield,
Valerie Belcher,
1994
.
Christoph Burger,
Roy Hartfield,
R. Hartfield,
2006
.