Investigaciones y ensayos.

v.1 1966; no.1-2 1966-67; v.1-2 1966-67; no.2 Jan.-June 1967; no.3 1967; v.3 1967; no.4 1968; no.5 1968; no.5 1968 Jul-Dec; no.6-7 1969; v.4-5; v.6-8 1969-70; no.8 1970; no.8 1970 Jan-Jun; no.9 1970; no.9 1970 Jul-Dec; v.9 1970; no.10 1971; no.10 1971 Jan-Jun; no.11 1971; no.11 1971 Jul-Dec; v.10 1971; v.11 1971; no.12 1972; no.13 1972; v.12 1972; v.13 (July-Dec 1972); no.14 1973 INCOMP.; no.15 (1973); no.15-16 1973-74; no.17 1974; no.17 1974 Jul-Dec; no.18 1975; no.18 1975 Jan-Jun; no.19 1975; no.19 1975 Jul-Dec; no.20 1976; no.20 1976 Jan-Jun; no.21 1976; no.21 1976 Jul-Dec; no.22-23 1977; no.22 1977 Jan-Jun; no.22 (1977); no.23 1977 Jul-Dec; no.23 (1977); no.24 1978; no.24 1978 Jan-Jun; no.25 1978; no.25 1978 Jul-Dec; v.14; v.15; v.16; v.17; v.24-25 1978; no.26 1979; no.26 1979 Jan-Jun; no.26-27 yr.1979; no.27 1979; no.27 1979 Jul-Dec; no.28 1980; no.28-29 1980; no.29 1980; no.30 1981; no.30 1981 Jan-Jun; no.31 1981 Jul-Dec; v.30-31 1981; no.31 1982; no.32 1982; no.32 1982 Jan-Jun; no.33 1982; no.33 1982 Jul-Dec; v.32-33 1982; no.34 1983; no.34 1983 Jan-Jun; no.34-35 yr.1983/87 mo.JAN-JUN; no.35 1983/87; no.35 1987 Jan-Jun; no.36 1987; no.36 1987 Jul-Dec; no.36-37 yr.1987/88 mo.JUL-JUN; no.37-38 1988; no.37 1988 Jan-Jun; no.38 1988 Jul-Dec; no.39 1989; no.40 1990; no.41 1991; no.42 1992; no.42 1993; no.43 1993; no.44 1994; no.45 1995; no.46 1996; no.47 1997; no.48 1998; no.49 1999; no.50 2000; no.51-52 2001-02; no.53 2003; no.54 2004; v.55 2005; v.56 2006-2007; v.57 2008; v.58 2009; v.59 (2010)