Cano Martinez de Velasco, J. Ignacio. <br/><br/>
La obligacion natural. 

 - Barcelona  Bosch  1990. 
 - 98 p.  22 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural obligations--Spain.<br/>Natural obligations Roman Law.