International stratigraphic guide :  A guide to stratigraphic classification, terminology and procedure / 
By international subcommission on stratigraphic classification of iugs commission on stratigraphy ; hollis d. hedberg, editor 
 - 200 páginas 
<br/><br/><label>ISBN: </label>0471367435 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estratigrafía
<br/><br/><label>LC Class. No.: </label>QE651  / I57 1976