Howden, Henry F. <br/><br/>
Speculations on some beeties, barriers, and climates during the pleistocene and prepleistocene periods in some nonglaciated portions of north America 

<br/><br/> Sobretiro de : Sustematic zoology 12(4):178-201, 1963 
<br/><br/><label>LCCN: </label>16648 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Insectos fósiles.