Ramos Pérez, Demetrio <br/><br/>
El Tratado de límites de 1750 y la expedición de Iturriaga al Orinoco 
Demetrio Ramos Pérez ; prólogo del Dr. Amando Melón y Ruiz de Gordejuela. 
 - Madrid  Consejo Superior de Investigaciones Científicas, Instituto Juan Sebastián Elcano  1946. 
 - iv, [7]-537 p.  maps. 
<br/><br/> Originally presented as the author's thesis, Madrid, 1944.  Includes indexes. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Iturriaga, José de.
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Madrid, Treaty of, 1750.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Orinoco River Venezuela and Colombia--Discovery and exploration.<br/>Orinoco River Valley Venezuela and Colombia--Discovery and exploration.