Borlaug, Norman Ernest. <br/><br/>
A cereal breeder and ex-forester's evaluation of the progress and problems involved in breeding rust resistant forest trees 

 - (s.l.) :  (s.e.),  (s.a.) 
 - 52 h. 
<br/><br/> Fotocopia 
<br/><br/><label>LCCN: </label>21253 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Árboles--Mejoramiento.<br/>Árboles--Resistencia a enfermedades.