Graptolithina

Cyclograptidae Bulman, 1938

Selection of related publications
Mierzejewski, P. 1978. Tuboid graptolites from erratic boulders of Poland. Acta Palaeontologica Polonica 23, 4, 557-574.
Bulman, O. M. B., Rickards, R. B. 1966. A Revision of Wiman's Dendroid and Tuboid Graptolites. Bulletin of Geological Institutions of the University of Uppsala 43, 6-8, 1-72.
Skevington, D. 1963. Graptolites from the Ontikan Limestones (Ordovician) of Öland, Sweden. I: Dendroidea, Tuboidea, Camaroidea, and Stolonoidea. Bulletin of Geological Institutions of the University of Uppsala 42, 1-62.
Obut, A. M. 1960. Correlation of some parts of Estonian Ordovician and Silurian deposits according to graptolites. ENSV TA Geoloogia Instituudi uurimused V, 143-157. Eesti NSV Teaduste Akadeemia Geoloogia Instituudi Uurimused V, pp. 143-157.
Obut, A. M. 1957. Kassifikaciâ i ukazatel' rodov graptolitov. Ežegodnik Vsesoûznogo Paleontologičeskogo Obŝestva XVI, 11-47.