Olson, Storrs L. <br/><br/>
Presbyornis and the origin of the Anseriformes (Aves, Charadriomorphae) / 
Storrs L. Olson and Alan Feduccia. 
 - Washington :  Smithsonian Institution Press,  1980. 
 - Smithsonian contributions to zoology ;  no. 323 .
<br/><br/>Bibliography: p. 23-24. 
<br/><br/><label>LCCN: </label>80607065 //r902 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anseriformes -- Evolution.--Anseriformes -- Evolution.<br/>Presbyornis -- Evolution.--Presbyornis -- Evolution.<br/>Birds -- Evolution.--Birds -- Evolution.
<br/><br/><label>LC Class. No.: </label>QL1  QL696.A5  / .S54 no. 323 
<br/><br/><label>Dewey Class. No.: </label>591 s  568/.3 
<br/><br/><label>Gov. Doc. Class. No.: </label>SI 1.27:323