Submitted on: 01 March 2000.
Revised on: 23 March 2000.
Accepted on: 10 May 2000.
___________________Didactica-Lengua y Literatura---UNIV COMPLUTENSE MADRID, SERVICIO PUBLICACIONES
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Submitted on: 18 March 2017.
Revised on: 16 July 2017.
Accepted on: 10 August 2017.
___________________Didactica-Lengua y Literatura---UNIV COMPLUTENSE MADRID, SERVICIO PUBLICACIONES