Parrilla Bonilla, Antulio, <br/><br/>
Cooperativismo  teoria y practica 
Antulio Parrilla-Bonilla 
 - San Juan, P.R.  Editorial Universitaria  1971. 
 - 352 p. 
<br/><br/>Bibliography: p.349-352. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cooperation--Sources--Puerto Rico.<br/>Cooperativism--History--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Cooperation--Sources--History.