W. Purdy
发表
R. Franke,
W. Purdy,
Ray Franke,
2012
.
M. Chrisman,
W. Purdy,
Sangbeak Ye,
2020
.
M. Chrisman,
W. Purdy,
Robert Wright,
2021,
International journal of environmental research and public health.
W. Purdy,
2002,
The Hastings Center report.
Patricia M. McDonough,
S. Calderone,
W. Purdy,
2007
.