Deep debate in the 1970 Belgian Grand Prix pits at Spa-Francorchamps as three-time World Champion Jack Brabham - seated in his own Brabham-Cosworth BT33 - reports an apparent problem to his long-time business partner and chief designer Ron Tauranac and their three mechanics - including a youthful Ron Dennis (later head of McLaren International) at the left.  People pictures - capturing the inter-action of great drivers, great engineers, slavishly-driven dedicated racing mechanics, form a crucial element within the GP Library Collection.