Kullmann, Jurgen <br/><br/>
Ammonoid evolution during the critical intervals before and after the Devonian-Carboniferous boundary and the Mid-Carboniferous boundary 

 - Wien  Geologische Bundesanstalt  2002 
 - pp. 371-377  ilus., tbls. 
 - Austria. Abhandlungen der Geologischen Bundesanstalt .
<br/><br/><label>Subjects--Topical Terms: </label><br/>AMMONOIDEA<br/>CARBONIFERO MEDIO<br/>DEVONICO<br/>EVOLUCION