Johnson,J.Harlan <br/><br/>
Lime-secreting algae and algal limestones from the Pennsylvanian of Central Colorado 

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 - EEUU    1940 
 - 24p.  21cm 
 - Bulletin of the Geological Society of America   v.51 .
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label>--Algas fosiles--calizas algales--Pennsylvania--Colorado--Paleobotanica--Plantas fosiles--Paleontologia--Estados Unidos<br/>Geologia