Dobbins, Bill (photographer) and Knoll, Steve (scanner). "Glen, is this Karl Ludvigsen's Quantum?" Marlboro_Raceway · Marlboro Motor Raceway YahooGroup. 2009. http://groups.yahoo.com/group/Marlboro_Raceway/photos/album/209901720/pic/909898341/view
Karl Ludvigsen at Marlboro in 1966
Not my photo. This was shot by Bill Dobbins and scanned by Steve Knoll.