By Tate Nicholas   Unwin David   in Journal of Geography in Higher Education

ISSN:1466-1845|33|1|1-6

Routledge Ltd‎(2009)‎

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By Lü Junchang   Unwin David   Xu Li   Zhang Xingliao   in Naturwissenschaften

ISSN:0028-1042|95|9|891-897

Springer Publishing Company ‎(2008)‎

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