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ACROSS
1)  an informal term for a father; probably derived from baby talk
2)  german industrialist who was the first in germany to use an assembly line in manufacturing automobiles (1871-1948)
3)  a movable organ for flying (one of a pair)
4)  an independent agency of the united states government responsible for aviation and spaceflight


DOWN
1)  soft fine feathers
2)  the capital of western samoa
3)  the habitation of wild animals
4)  primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves

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dada
opel
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