Olga Mata Coimbra ; Isabel Coimbra, . (1998). Portugues Sem Fronteiars. : .
Olga Mata Coimbra ; Isabel Coimbra, . 1998. Portugues Sem Fronteiars. : .
Olga Mata Coimbra ; Isabel Coimbra, . Portugues Sem Fronteiars. : . 1998.