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Pérez Iturmendi, Julián (2)
Riancho Andrés, Rubén (2)
Artiaga Usieto, Carmen (1)Cortés Azparren, María Ángeles (1)Izco Sanz, Sagrario (1)... moreSubjectactividades al aire libre (1)agricultura (1)ciencias de la naturaleza (1)clase experimental (1)educación ambiental (1)... moreDate issue1996 (1)1998 (1)