Projekt landschappenkaart 1977-1978
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Pupils' knowledge of and attitude to environment before and after exposure to environment project ( landschappenkaart ) / also teachers' attitude to environment and natural...
参与环境项目（landschappenkaart）前后学生的环境知识掌握程度与环境态度，同时涵盖教师对环境及自然……的态度
