_:B3141377ff5e2be3b6b40aab09d7ae977 . . "53(075)"^^ . "vormtrefwoord" . . "leermiddelen ; natuurkunde"@nl . . . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 "2021-09-24"^^ . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 "075629178" . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 . _:B3141377ff5e2be3b6b40aab09d7ae977 .