1. La mordaza :
by Acosta, Ivonne. 
Price: USD 95.02
Dealer: Abebooks, Puvill Libros
Description: ISBN10: 8459984699, ISBN13: 9788459984690, [publisher: Editorial Edil,, Río Piedras :] Softcover [Barcelona, BCN, Spain] [Publication Year: 1987]  

2. La mordaza: Puerto Rico, 1948-1957 (Spanish Edition)
by Acosta, Ivonne 
Price: USD 420.59
Dealer: Abebooks, Iridium_Books
Description: ISBN10: 8459984699, ISBN13: 9788459984690, [publisher: Editorial Edil] Softcover 8459984699 [DH, SE, Spain] [Publication Year: 1987]