The orientation parameters and rotation curves of 15 spiral galaxies A. M. Fridman, V. L. Afanasiev, S. N. Dodonov, O. V. Khoruzhii, A. V. Moiseev, O. K. Sil'chenko and A. V. Zasov A&A, 430 1 (2005) 67-81 Published online: 12 January 2005 DOI: 10.1051/0004-6361:200400087