https://dersdunyasi.net/li%cc%87se/9-sinif/co%c4%9frafya-9/co%c4%9frafya-9-yard%c4%b1mc%c4%b1-kaynak-kitap-1-%c3%bcnite-do%c4%9fal-sistemler-1-1-i%cc%87nsan-do%c4%9fa-i%cc%87li%c5%9fkileri-ve-duyarl%c4%b1l%c4%b1k/