Liegel, Leon Herman <br/><br/>
Seasonal nutrition of 3- and 4- year old Pinus caribaea foxtails and normal -branched trees in Puerto Rico 
Leon H. Liegel. 
 - Raleigh, N.C.  North Carolina State University  1981. 
 - vi, 140 p.  ill. 
<br/><br/> Typescript (photocopy) Ann Arborr,Mich., University Microfilm International. 
<br/><br/>Thesis (PhD.) --North Carolina State University at Raleigh, 1981. 
<br/><br/>Bibliography : p. 89-92. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pinus caribaea--Puerto Rico.<br/>Forest and forestry--Puerto Rico.<br/>Forest solils--Tropic.<br/>Forest and forestry--Tropics.