Boucek, Bedrich.  <br/><br/>
Lower Ordovician graptolites of Bohemia. 

 - Prague, :   Czechoslovak Academy of Sciences,   1973. 
 - 185 p.  illus.  24 cm. 
<br/><br/> Summary in Czech. 
<br/><br/>Bibliography: p. [150]-154. 
<br/><br/><label>LCCN: </label>73179062  
<br/><br/><label>Nat. Bib. No.: </label>Cz*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graptolites--Graptolitas--Czechoslovakia--Checoslovaquia--Bohemia.<br/>Paleontology--Paleontologia--Ordovician.--Ordovicio Inferior<br/>Paleontology--Czechoslovakia--Bohemia.--Estratigrafia--Fosiles--Paleozoologia<br/>Geologia<br/>z3950.loc.gov:7090/Voyager USA-Library Of Congress 
<br/><br/><label>LC Class. No.: </label>QE840.5  / .B6813 
<br/><br/><label>Dewey Class. No.: </label>563/.71