Jeff Powell
发表
Erik Buisman,
Hans van Oostenbrugge,
Jeff Powell,
2008
.
Jeff Powell,
David Hall,
Jane Lethbridge,
2014
.
Scott Carroll,
Jeff Powell,
Katie Powell,
2011
.
Jeff Powell,
Lane Harper,
Em M. Pijl,
2017,
Harm Reduction Journal.
Jodi Summers Holtrop,
Jeff Powell,
J. Holtrop,
2007,
The Annals of Family Medicine.