Philip A. Ebert
发表
Roy T. Cook,
Philip A. Ebert,
2004
.
Roy T. Cook,
Philip A. Ebert,
R. Cook,
2004
.
Marcus Rossberg,
Roy T. Cook,
Philip A. Ebert,
2013
.
Philip A. Ebert,
P. Ebert,
2018,
Journal of Adventure Education and Outdoor Learning.
Philip A. Ebert,
P. Ebert,
2005
.
Philip A. Ebert,
Simon Robertson,
2007
.
Philip A. Ebert,
2005
.
Roy T. Cook,
Philip A. Ebert,
R. Cook,
2004
.
Marcus Rossberg,
Philip A. Ebert,
J. J. Green,
2015,
The Bulletin of Symbolic Logic.
Philip A. Ebert,
Simon Robertson,
2010
.