By Taconis R.   van der Plas P.   van der Sanden J.   in European Journal of Teacher Education

ISSN:1469-5928|27|2|215-240

Routledge Ltd‎(2004)‎

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By McNairn H.   Ellis J.   Van Der Sanden J. J.   Hirose T.   Brown R. J.   in International Journal of Remote Sensing

ISSN:1366-5901|23|5|851-870

Taylor & Francis Ltd‎(2002)‎

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