Evolutionary chains in the graptolite Bohemograptus bohemicus (BARR), a case for gradualism = L'évolution du graptolite Bohemograptus bohemicus (BARR): un cas de gradualismeURBANEK, A.Mezhdunarodnyj geologicheskij kongress. 27. 1984, pp 323-324Conference Paper

ZUR GATTUNG BOHEMOGRAPTUS GEN.N.(GRAPTOLOIDEA) AUS DEM BOEHMISCHEN UND FREMDEN LUDLOVIUM.(SUR LE GENRE BOHEMOGRAPTUS GEN.N.(GRAPTOLOIDES) DU LUDLOW DE BOHEME ET DES PAYS ETRANGERS).PRIBYL A.1967; CAS.NAROD.MUZ.HIST.MUS.PRAHA; CSK; 1967, VOL. 136, NUM. 0003, P. 133 A 136Miscellaneous