Borio, Gene. "Tobacco Timeline: The Nineteenth Century—The Age of the Cigar". Tobacco.org: Tobacco News and Information. April 28, 2010.
Borio, Gene. "Tobacco Timeline: The Twentieth Century 1950–1999—The Battle is Joined". Tobacco.orgArchived 2012-04-22 at the Wayback Machine.: Tobacco News and Information. April 28, 2010.
Borio, Gene. "Tobacco Timeline: The Twentieth Century 1950–1999—The Battle is Joined". Tobacco.orgArchived 2012-04-22 at the Wayback Machine.: Tobacco News and Information. April 28, 2010.