Maxon, William R.  1877-1948. <br/><br/>
A study of certain Mexican and Guatemalan species of Polypodium. 
By William R. Maxon. 
 - Washington,  Govt. print. off.,  1903. 
 - v, 271-280 p.  LXI-LXII pl.  23 cm. 
 - Smithsonian institution.  United States national museum.  Contributions from the United States national herbarium.  vol. VIII, pt. 3 .
<br/><br/><label>LCCN: </label>agr06000921  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polypodium.
<br/><br/><label>LC Class. No.: </label>QK1  / .U5 v. 8, pt. 3