An interview with Bob Williams, a crack user, hosted by Gil Noble. Source: Like It Is, TV series, WABC-TV, 1968 - 2011. Original air date September 12, 1981.
https://www.youtube.com/watch?v=6O84k3g8z_s [ 1981 Interview Of A Well Educated Engineer Detailing his $1,600 An Hour Crack Addition. ]