Centrul de Material Didactic Si Propaganda Agricola creator text rm 1974 1990 continuing a -Existencias: CONTINUACION DE PROBLEME AGRICOLE // 1974 vol. 26, no. 7-12; 1976 vol. 28, no. 1-12; 1977 vol. 29, no. 1-10; 1978-1980 vol. 30-32, no. 1-12; 1981 vol. 33, no. 7-12; 1982 vol. 34, no. 1-6; 1985 vol. 37, no. 1-12; 1986 vol. 38, no. 1-12; 1987 vol. 39, no. 1-8; 1988 vol. 40, no. 7-12; 1989 vol. 41, no. 1-12; 1990 vol. 42, no. 1-4 Agricultura AR-ReUNN 260630 20260702003746.0 251366 spa