Trace.

no.1-19; no.1-2 1952; no.2 (1952); no.3-5 1953; no.1-9 (1952-54); no.6-9 1954; no.10-14 1955; no.2-3,5-11,13-19 1952-1956; no.3-19 (1953-56); no.10-19 1955-56; no.15-19 1956; no.20-24 1957; v.15-29 (1956-58); no.20-29 1957-58; no.25-29 1958; no.20-34 1957-1959; no.30-34 1959; no.30-39 (1959-60); no.35-43 1960-1961; no.35-43 1960-61; no.40-43 1961; no.44-47 1962; no.40-47 (1961-63); no.44-47 1962-63; no.48-51 1963; no.44-51 1962-1964; no.48-51 (1963-64); no.52-55 1964; no.52-55 1964-1965; no.52-55 1964-65; no.56-59 1965; no.56-59 1965-66; no.60-63 1966; no.60-67 1966-1967; no.60-63 (1966-67); no.64-66 1967; no.64-66 1967-1968; no.64-66 1967-68; v.64-66 (1967-68); no.67-69 (1968); no.67-69 1968-69; v.67-69 (1968-69); no.70-71 1969-70; no.70-73 1969-1970; v.70-73 (1969-70); no.72-73 1970