Philippines (Republic) Tobacco Administration. Care and management of tobacco seedbed. [s.n.
Chicago-referens (17:e uppl.)Philippines (Republic) Tobacco Administration. Care and Management of Tobacco Seedbed. Manila: [s.n.
MLA-referens (9:e uppl.)Philippines (Republic) Tobacco Administration. Care and Management of Tobacco Seedbed. [s.n.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.