ΓΕΩΓΡΑΦΙΑ ΚΕΦ.4 : Ο ΑΞΟΝΑΣ ΚΑΙ Η ΠΕΡΙΣΤΡΟΦΗ ΤΗΣ ΓΗΣ -ΗΜΕΡΑ ΚΑΙ ΝΥΧΤΑ

 http://daskalosa.eu/geography_st/st_geography_4_o_axonas_kai_i_peristrofi_tis_gis_imera_kai_nyxta.html

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https://blogs.sch.gr/vilikar/2025/10/03/4-o-axonas-kai-i-peristrofi-tis-gis-imera-kai-nychta

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https://nearaidestos.weebly.com/4-omicron-940xiomicronnualphasigmaf-kappaalphaiota-eta-piepsilonrhoiotasigmataurhoomicronphi942-tauetasigmaf-gammaetasigmaf.html

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https://ebooks.edu.gr/ebooks/v/html/8547/2272/Geografia_ST-Dimotikou_html-empl/indexA_4.html