WATT, Arthur D. <br/><br/>
Catalog of the illustrated paleozoic plant specimens in the National Museum of Natural History / 
Arthur D. Watt. 
 -- Washington :   Smithsonian Institution Press,   1970 
 - 53 p. -- 
 (Smithsonian Contributions to paleobiology  ; 5).
<br/><br/><label>Subjects--Topical Terms: </label><br/>National Museum of Natural History<br/>Paleobotánica - Paleozoico<br/>Paleobotánica - U.S.A. - Catálogos y Colecciones
<br/><br/><label>Universal Decimal Class. No.: </label>069.51:502.2 ; 561"613"