On the graptolites : described by Hisinger and the older Swedish authors /
Tullberg, S. A.
On the graptolites : described by Hisinger and the older Swedish authors / by S. A. Tullberg - Stockholm : P. A. Norstedt & Soner, 1882 - 23 p. : ill. ; 23 cm - Bihang till Kongl. Svenska Vetenskaps-akademiens handlingar ; 6 .
On the graptolites : described by Hisinger and the older Swedish authors / by S. A. Tullberg - Stockholm : P. A. Norstedt & Soner, 1882 - 23 p. : ill. ; 23 cm - Bihang till Kongl. Svenska Vetenskaps-akademiens handlingar ; 6 .