Journal of educational technology systems (Online)

28 to 33, 35 to 41, 45 to 51

34, 42 to 44

28 to 31, 51

32 to 50

38 (3, 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4)

Preserved : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-4); 7 (1-4); 8 (1-4); 9 (1-4); 10 (1-4); 11 (1-4); 12 (1-4); 13 (1-4); 14 (2-4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1, 2-3, 4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-3); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1-4); 48 (1, 2)

Preserved : 1972/1973: 1(1-4), 1973/1974: 2(1-4), 1974/1975: 3(1-4), 1975/1976: 4(1-4), 1976/1977: 5(1-4), 1977/1978: 6(1-4), 1978/1979: 7(1-4), 1979/1980: 8(1-4), 1980/1981: 9(1-4), 1981/1982: 10(1-4), 1982/1983: 11(1-4), 1983/1984: 12(1-4), 1984/1985: 13(1-4), 1985/1986: 14(2-4), 1986/1987: 15(1-4), 1987/1988: 16(1-4), 1988/1989: 17(1-4), 1989/1990: 18(1-4), 1990/1991: 19(1-4), 1991/1992: 20(1-4), 1992/1993: 21(1-4), 1993/1994: 22(1-4), 1994/1995: 23(1-4), 1995/1996: 24(1-4), 1996/1997: 25(1-4), 1997/1998: 26(1-4), 1998/1999: 27(1-4), 1999/2000: 28(1-4), 2000/2001: 29(1-4), 2001/2002: 30(1-4), 2002/2003: 31(1-4), 2003/2004: 32(1-4), 2004/2005: 33(1-4), 2005/2006: 34(1-4), 2006/2007: 35(1-4), 2007/2008: 36(1-4), 2008/2009: 37(1-4), 2009/2010: 38(1-4), 2010/2011: 39(1-4), 2011/2012: 40(1-4), 2012/2013: 41(1-4), 2013/2014: 42(1-4), 2014/2015: 43(1-4), 2015/2016: 44(1-4), 2016/2017: 45(1-4), 2017/2018: 46(1-4), 2018/2019: 47(1-4), 2019/2020: 48(1-4), 2020/2021: 49(1-4), 2021/2022: 50(1-4), 2022/2023: 51(1-3)

Preserved : 27 (3, 4); 28 (1 to 4); 29 (1 to 4); 30 (1 to 4); 31 (1 to 4); 32 (1, 2-3, 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4); 51 (1 to 3)