Four quarters.

v.1-3 (Nov 1951-June 1954); v.4 no.4 1955; v.5 no.1 Nov 1955; v.5 no.1 1955; v.5 no.2 1956; v.6 no.1-2 Nov-Jan 1956-57; v.4-6 (Nov 1954-May 1957); v.7 no.3 1958; v.7 no.4 1958; v.8 no.2 1959; v.8 no.3 1959; v.8 no.4 1959; v.7-9 (Nov 1957-May 1960); v.9-10 1959/60-1960/61; v.11 1961/62; v.10-12 (Nov 1960-May 1963); v.12-14 1962/63-1964/65; v.13-15 (Nov 1963-May 1966); v.15-17 1965/66-1967/68; v.18-19 1968-70; v.16-19 (Nov 1966-May 1970); v.20-22 (1970-72); v.20-21 1970/71-1971/72; v.22-23 1972/73-1973/74; v.23 (Autumn 1973-Summer 1974); v.24 (Autumn 1974-Summer 1975); v.24-25 1974/75-1975/76; v.25 (Autumn 1975-Summer 1976); v.26 (Autumn 1976-Summer 1977); v.26-27 1976/77-1977/78; v.28 no.1 Autumn 1978; v.27-28 (1977-79); v.28 no.2 Winter 1979; v.28 no.3 Spring 1979; v.28 no.4 Summer 1979; v.29 no.1 Autumn 1979; v.29 no.2 Winter 1980; v.29 no.3 Spring 1980; v.29 no.4 Summer 1980; v.30 no.1 Autumn 1980; v.29-30 (1979-81); v.30 no.2 Winter 1981; v.30 no.3 Spring 1981; v.30 no.4 Summer 1981; v.31-33 (Autumn 1981-Summer 1984); v.34:1 (Autumn 1984); v.34 Aut.1984-Sum.1985; v.34:2 (Winter 1985); 2nd ser. v.1-3 1987-89; 2nd Ser.v.4-6 1990-92; 2nd Ser.v.7-9 1993-95