I don't have a URL, but I know that my father (who smoked) called them "coffin nails" and "cancer sticks" as early as the '40s. The warning notes showed up on packs around 1960.
It was never a secret.
When I was a little kid, I thought "Why would I put smoke where air is supposed to go?" I didn 't need The Government to tell me smoking was something I didn't want to pursue. Now I eat too much red meat--I guess we're going to damn the meatpacking industry for not coming to my house and regulating my diet?