Brabham BT21C car-by-car histories
SCCA Formula B was booming in 1968 and Brabham's US dealer Fred Opert imported up to 16 of the latest Brabham BT21C model. The BT21C was an update to the 1967 BT21A and visually almost identical.
Brabham Gallery 1 - All Car Central Magazine
1967 Brabham BT21C - Motorsports Market
Brabham BT21 - Wikipedia
111 Brabham BT21B Formula 3 (1968) Gil Duffy, Brabham BT21B…
Brabham BT37 - Wikipedia
Committee Profile: Wayne Wilson, Brabhams BT 21 and BT29 – Group O
Brabham BT46 - Wikipedia
Historic Hot Laps: On-Board a 1968 Brabham BT21C - Historic Sports
available for download on the website - Historic Sports and Racing
Brabham bt21
Unidentified Formula B car - TNF's Archive - The Autosport Forums
Enjoy a Private Tour of the Museums Discovery Centre, Including
2 Bourgeault Formula B Cars - Motorsports Market
Brabham BT21C car-by-car histories
1968 Brabham BT21