Yazar
Siv Sellin
2 cilt bulundu.
Cilt sonuçları
Working for better water quality in the Baltic Sea
Kerstin Lantz Persson, Siv Sellin, Sweden. Skolverket · National Agency for Education in Sweden in cooperation with UNESCO
204 sayfa · 1998
Water quality / Environmental conditions
From words to action
Jakob Ström, Siv Sellin, Kerstin Lantz Persson · National Agency for Education in Sweden in cooperation with UNESCO
134 sayfa · 1998
Environmental education / Activity programs / Sustainable development / Study and teaching / Ecology