共 49 条
[1]
[Anonymous], 2006, Infotopia: How Many Minds Produce Knowledge
[2]
Audubon, 2012, CHRISTM BIRD COUNT
[3]
Audubon, 2010, LEG INF NAT AUD SOC
[4]
Bearden M. J., 2007, NCGIA VESP WORKSH VO
[5]
Boston, 2011, BOSTON
[6]
Cain P., 2011, BLOG MAPS NEW MEDIA
[8]
Volunteered Geographic Information: The Nature and Motivation of Produsers
[J].
INTERNATIONAL JOURNAL OF SPATIAL DATA INFRASTRUCTURES RESEARCH,
2009, 4
:332-358
[9]
Creative Commons, 2012, AB LIC
[10]
Cyclopath, 2010, US AGR