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BMW 3 Series (E21) - Wikipedia
BMW 3 Series - E21 Market - CLASSIC.COM
BMW E21 3-Series For Sale - BaT Auctions - Bring a Trailer
Buyer’s guide: BMW E21 3 Series - Classic & Sports Car
BMW 3 Series E21 History and Specs
BMW 320i - E21 Market - CLASSIC.COM
BMW 3 SERIES (E21) BUYER'S GUIDE - Classics World
E21 BMW 3 Series Retro Review From Car and Driver - BMW BLOG
BMW E21: Pioneering the 3 Series Legacy - YouTube
Driving all the BMW 3-Series, Chapter 1: E21 (1975-1982)