Romero, O., Arch..
Voice of the Voiceless: The Four Pastoral Letters and Other Statements ; Introductiry Essays by I.Martin-Baro and J.Sobrino /
Transl.from the Spanish by M.J.Walsh 
. - Maryknoll ; New York  : Orbis Books,  1985 
. - 202 p.  24 cm. 
<br/><label>  ISBN: </label>0-88344-525-5