Citation: Korn,d et Vohringer,e, Allometric growth and intraspecific varibility in the basal carboniferous ammonoid Gattendorfia crossa SCHMIDT,1924, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 78(2), 2004, pp. 425-432