Phipps, J. B. <br/><br/>
Biogeographic, taxonomic, and cladistic relationship between east asiatic and north american crataegus 

<br/><br/> Sobretiro de: Ann Missouri Bot. Gard. 70 : 667-700, 1983. 
<br/><br/><label>LCCN: </label>50131 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fitogeografía.<br/>Tejocote--Clasificación.