By López Ruyol, Ebenecer.
Carolina, P.R. Instituto Técnico Sindical 1998 .
xiv, 294 p. , Contains the author's biographical data. 20 cm..

By López Ruyol, Ebenecer.
Carolina, P.R. Instituto Técnico Sindical 2005 .
236 p. , Contains the author's biographical data. 20 cm..

By López Ruyol, Ebenecer.
Puerto Rico Editorial ITS, Inc. 2005 .
144 p. 22 cm..
159608099X

By López Ruyol, Ebenecer.
Puerto Rico : s.n., 2016 .
xvi, 308 pages , Contains the author's biographical data. 23 cm..
9781530320677

By Cruz Jusino, Félix M..
Lajas, Puerto Rico : Centro de Estudios e Investigaciones del Sur, 2020 .
271 páginas: ilustraciones; 23 cm.
9798574078464