Tropical soils research program  Annual report for 1975 
North Carolina State University 
 - North Carolina, USA  North Carolina State University  November 1976 
 - 312p.  ill.  28 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Tropics--Periodicals<br/>Agriculture--Periodicals--Latin America<br/>Soils--Tropics--Periodicals<br/>Soils--Periodicals--Latin America