Bird Piñero, Julio, <br/><br/>
Mosaic of Jatropha gossypifolia in relation to the leaf-curl virus of tobacco in Puerto Rico. 

 -  1956. 
 - 46 l.  illus., tables.  29 cm. 
<br/><br/> Vita. 
<br/><br/>Thesis (Ph.D.)--Univ. of Minnesota. 
<br/><br/>Bibliography: leaf 46. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mosaic diseases.<br/>Tobacco--Diseases and pests.<br/>Jatropha.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico