http://tobaccodocuments.org/mayo_clinic/2028364436-4439.html
"ETS PLAN AND BUDGET FOR THE YEARS 1988, 1989, 1990 AND 1991". 19 Apr 1988. Bates: 2028364436-2028364439. http://tobaccodocuments.org/mayo_clinic/2028364436-4439.html