%0 Conference Proceedings %T Variations on the essential oil content and composition of Achillea millefolium subsp. millefolium in two successive years after sowing, in Iran %A Ghani, Askar %A Vahdati Mashhadian, Navid %A Azizi, Majid %A Ebadi, Mohammad Taghi %A M. Hasanzadeh-e-khayyat %J Proceeding of International Medicinal and Aromatic Symposium %D 2010