Petra Hellegers
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Brian Davidson,
Hector Malano,
Biju George,
2011
.
Petra Hellegers,
Wim G.M. Bastiaanssen,
H. C. Jansen,
2012
.
Petra Hellegers,
R.W.O. Soppe,
A. Schrevel,
2004
.
E. C. van Ierland,
Petra Hellegers,
P. Hellegers,
2002
.
J.W.A. Langeveld,
Petra Hellegers,
G. W. Meijerink,
2008
.
Floor Brouwer,
Petra Hellegers,
P. Hellegers,
1999
.
Petra Hellegers,
Charles Rodgers,
P. Hellegers,
2005
.
Jurian Edelenbos,
Petra Hellegers,
Matthijs Kok,
2014
.
Petra Hellegers,
D. Boon,
C. J. Perry,
2006
.
Brian Davidson,
Hector Malano,
Biju George,
2011
.
David Zilberman,
Deepak Rajagopal,
Petra Hellegers,
2008
.
Petra Hellegers,
P. Hellegers,
2006
.
Petra Hellegers,
Ekko C. van Ierland,
P. Hellegers,
2017,
Natural Hazards.