Observational evidence of activity in galaxies : proceedings of the 121st Symposium of the International Astronomical Union, held in Byurakan, Armenia, U.S.S.R., June 3-7, 1986
edited by E. Ye. Khachikian, K.J. Fricke, and J. Melnick.
Dordrecht : D. Reidel, ©1987.
xxii, 601 págs. : ilustraciones ; 25 cm.
ISBN: 9027724741 (pbk.)
Incluye referencias bibliográficas e índices.