_:B57b3067c018192570f1bb5e307a64b31 . "Bestaan er getekende militair-topografische kaarten of vestingplannen van Simon Stevin?" . "nl" . . . "Bestaan er getekende militair-topografische kaarten of vestingplannen van Simon Stevin? / F. Westra" . . . . _:B57b3067c018192570f1bb5e307a64b31 . _:B57b3067c018192570f1bb5e307a64b31 "2021-10-11"^^ . _:B57b3067c018192570f1bb5e307a64b31 "2000-04-20"^^ . _:B57b3067c018192570f1bb5e307a64b31 . _:B57b3067c018192570f1bb5e307a64b31 . _:B57b3067c018192570f1bb5e307a64b31 "192586750" . _:B57b3067c018192570f1bb5e307a64b31 . _:B57b3067c018192570f1bb5e307a64b31 .