2.192
bewerkingen
Dyna Soar: verschil tussen versies
→Referentie
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| Regel 5: | Regel 5: | ||
== Referentie == | == Referentie == | ||
[https://en.wikipedia.org/wiki/Boeing_X-20_Dyna-Soar, Lemma Boeing X-20 Dyna-Soar, Wikipedia 2015] | |||
== Bron == | == Bron == | ||