Contribution to paleontology :  Middle Cenozoic floras of Western North America. 

 - Washington :  Carnegie Institution,  1936. 
 - 148 p. :  il. ;  25 cm 
 - Carnegie Inst. Publ  455 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontología<br/>Cenozoico<br/>Flora
<br/><br/><label>Subjects--Geographic Terms: </label><br/>América del Norte
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Seriemon
<br/><br/><label>Universal Decimal Class. No.: </label>561(7-15)