text sp 1974 9999 continuing irregular a Existencias: [1974: 1] [1976: 2] [1979: 4-5] [1982: 6] [1983: 9-10] [1984: 11] [1986: 13] [1987: 14] [1988: 15] [1989: 17-18] [1992: 20] Tecnología Ciencias Agrarias 0210-02560 AR-ReUNN 260630 20260702153233.0 224222 spa