1.
Petropólis; Vozes; 5 ed; 1992. 130 p.
Monography
in Portuguese
| LILACS
| ID: lil-268669
Subject(s)
Humans , Communication , Communication Barriers , Education , Leadership , Volunteers/psychology
2.
Petropolis; Vozes; 4 ed; 1989. 130 p.
Monography
in Portuguese
| LILACS, SES-SP
| ID: lil-268661