The role of the principal in schoolimprovement : steering functions for implementation at the school level / Rein van der Vegt, Hans Knip

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The role of the principal in schoolimprovement : steering functions for implementation at the school level / Rein van der Vegt, Hans Knip 
Paper presented at the annual meeting of the American Eductional Research Association (AERA), Washington, 1987 
en 
The role of the principal in schoolimprovement : steering functions for implementation at the school level 
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