By A Mystery Man Writer
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 BT21C car-by-car histories
114 Brabham BT21B Formula 3 (1968) Jon Milicevic, Brabham B…
2 Bourgeault Formula B Cars - Motorsports Market
Brabham BT21C car-by-car histories
1968 Brabham BT21 Historic F3
100 Brabham BT21 F3 (1967), Brabham BT21 F3 (1967) Engine 9…
Brabham BT50, Classic Cars Wiki
Brabham BT 21C Lost history
available for download on the website - Historic Sports and Racing
Brabham BT51, Classic Cars Wiki
Brabham bt21
Brabham BT21A car-by-car histories
Brabham bt21
Brabham bt21