. "J.D." . "1947"^^ . "Jan van der Waals" . "van der Waals" . "Jan van der Waals" . "2009"^^ . _:Be334836aeb611062f774fcfd53b705a7 . . . "waal040" . "Waals, Jan van der (1947-2009)" . . _:Be334836aeb611062f774fcfd53b705a7 . _:Be334836aeb611062f774fcfd53b705a7 "2021-02-08"^^ . _:Be334836aeb611062f774fcfd53b705a7 . _:Be334836aeb611062f774fcfd53b705a7 . _:Be334836aeb611062f774fcfd53b705a7 . _:Be334836aeb611062f774fcfd53b705a7 . _:Be334836aeb611062f774fcfd53b705a7 .