Crum, H.A. <br/><br/>
The mosses of Porto Rico and the Virgin Islands /   
H.A. Crum and W.C. Steere. 
 - New York :   New York Academy of Sciences,   1957. 
 - 599 p. :   il. ;   25 cm. 
 - Scientific survey of Porto Rico and the Virgin Islands ;   v.7(4) .
<br/><br/><label>Subjects--Index Terms: </label>Musgos