O. Barder
发表
Heidi L. Williams,
O. Barder,
M. Kremer,
2011
.
O. Barder,
2006
.
O. Barder,
2005
.
O. Barder,
2006
.
O. Barder,
2006
.
O. Barder,
2006
.
O. Barder,
2015
.
O. Barder,
2014
.
O. Barder,
2009,
Encyclopedia of the UN Sustainable Development Goals.
O. Barder,
M. Kremer,
R. Levine,
2005
.
Heidi L. Williams,
O. Barder,
M. Kremer,
2006
.
O. Barder,
2009
.
O. Barder,
Theodore Talbot,
2015
.
Stephen M. Maurer,
Bronwyn H Hall,
S. Nwaka,
2022
.