Aragonian: the Stage concept versus Neogene Mammal Zones.
1981. Scripta Geologica 62; 17 pp. 3 fig. Comes with: Daams, R. et al.: Aragonian, a new stage for continental deposits of Miocene age. 1977. Reprint: Newsl. Stratigr. 6; pp. 42-55, 5 fig. Orig.wrps. very good.