Signal

v.5 no.3 -6, v.6 no.1-6, v.7 no.1-2 1951-1952; v.7 no.3 - v.9 no.2 1953-1954; v.9 no.3 - v.10 no.2 1955; v.11 no.5 - v.12 no.4 1957; v.13 no.5-8,10-12 1959; v.14 no.1-12 1959-1960; v.15 no.1-12 1960-1961; v.16 no.1-4 1961; v.18 no.11-12 1964; v.19 no.1-12 1964-1965; v.20 no.1-12 1965-1966; v.21 no.1-10 1966-1967; v.21 no.11-12 1967; v.22 no.1-12 1967-1968; v.23 no.1-3,5-11 1968-1969; v.24 no.1-12 1969-1970; v.25 no.1-12 1970-1971; v.26 no.1-10 1971-1972; v.27 no.1-10 1972-1973; v.28 no.1-11 1973-1974; v.29 no.1-10 1974-1975; v.30 no.1-10 1975-1976; v.31 no.1-10 1976-1977; v.32 no.1-10 1977-1978; v.33 no.1-10 1978-1979; v.34 no.1-10 1979-1980; v.35 no.1-11 1980-1981; v.36 no.1-11 1981-1982; v.37 no.1-6 1982-1983 no.1-6; v.37 no.7-12 1983; v.38 no.1-6 1983-1984; v.38 no.7-12 1984; v.39 no.1-4 1984