URN:NBN:SI:doc-ESDDQBL72000Delač Felda, Darjadocuments/doc/E/URN_NBN_SI_doc-ESDDQBL7_001.pdfdocuments/doc/E/URN_NBN_SI_doc-ESDDQBL7_001.txt274articlestr. 2150351-66529353049URN:NBN:SI:doc-ESDDQBL7slvDruštvo matematikov, fizikov in astronomov SlovenijePresekInCastronomijadevetletkaosnovna šola