R1A

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R1A stands for:

Vehicle category (1400 cm³, naturally aspirated engine, from 980 kg) within class RC5 of the World Rally Championship, see World Rally Championship # WRC3
Nitra feeder to Rýchlostná cesta R1
Ulsterquelle - Rotes Moor - Gersfeld section of the Fulda cycle path
Selkirk, Manitoba (zip code), Canadian city

R1a stands for:

Haplogroup R1a (Y-DNA)

See also:

R1
1A