His Viajero sin retorno, c1979: t.p. (Raúl Ferrer) p. 4 of cover (b. Yaguajay, 5/4/15)

His Educación de adultos en Cuba, 1976: t.p. (Raúl Ferrer Pérez)

Raúl Ferrer, 2015: title page (Raúl Ferrer) page 4 of cover (born 1915; died 1993; educator, poet, writer)