http://tobaccodocuments.org/rjr/500580898-0917.html
Rjr. "Advertising Research Report. Mrd#Ar-67-71. Camel 'Maine Coast': 60 on-Air Test.". 17 Oct 1967. Bates: 500580898-500580917. http://tobaccodocuments.org/rjr/500580898-0917.html