Instructor.

v.39 1929-1930; v.40 1930-1931; v.41 (1931-32); v.42 1932-1933; v.42 (1932-33); v.43 (1933-34); v.45 (1935-36); v.47 (1937-38); v.51 1941-1942; v.51 (1941-42); v.52 1942-1943; v.57 (1947-48); v.62 1952/53; v.63 Sept.-Dec.1953; v.64 1954/55; v.65 1955-1956; v.66 1956/57; v.66 1956-1957; v.67 1957/58; v.68 1958/59; v.69 1959/60; v.70 1960/61; v.70 (1960-61); v.71 1961/62; v.71 1961-1962; v.72 1962/63; v.72 1962-1963; v.73 1963/64; v.74 Sept.1964-Jan.1965; v.74 Feb.-June 1965; v.75 Sept.1965-Jan.1966; v.75 Feb.-June 1966; v.75:no.5-10 (1966); v.76 Aug.1966-Jan.1967; v.76 1966-67 Aug-Jan; v.76 Feb.-July 1967; v.77 Aug.1967-Jan.1968; v.77 1967-1968 Aug-Jan; v.77 Feb.-July 1968; v.78 Aug.1968-Jan.1969; v.78 no.1-5 1968-1969; v.78 Feb.-July 1969; v.78 no.6-10 1969; v.79 Aug.1969-Jan.1970; v.79 Feb.-July 1970; v.79:no.5-10 (1970); v.80 Aug.1970-Jan.1971; v.80 Feb.-July 1971; v.81 Aug.1971-Jan.1972; v.81 Feb.-July 1972; v.82 Aug. 1972-Jan.1973; v.82 Feb.-July 1973; v.83 Aug.1973-Jan.1974; v.83 Feb.1974-July 1974; v.84 Aug.1974-Jan.1975; v.84 Feb.1975-June 1975; v.84 no.6-9 1975; v.84:no.6-10 (1975); v.85 no.1-4 Aug- Dec 1975; v.85 Aug.1975-Jan.1976; v.85 no.1-5 1975-1976; v.85 Feb.1976-June 1976; v.85 no.5-9 Jan.-June 1976; v.85 no.6-9 1976; v.86 Aug./Sept.-Dec. 1976; v.86 no.1-4 Aug- Dec 1976; v.86 no.1-4 1976; v.86 Jan.-May 1977; v.86 no.5-9 Jan.-May 1977; v.86 no.5-9 1977; v.87 Aug.-Dec. 1977; v.87 no.1-5 Aug- Dec 1977; v.87 no.1-5 1977; v.87 Jan.-May 1978; v.87 no.6-10 Jan- May 1978; v.87 no.6-10 1978; v.88 Aug.-Dec. 1978; v.88 no.1-5 Aug- Dec 1978; v.88 no.1-5 1978; v.88:Jan-May 1979; v.88 no.6-10 1979; v.89 Aug.-Dec. 1979; v.89 no.1-5 1979; v.89 Jan.-May 1980; v.89 no.6-10 1980; v.90 no.1-5 1980; v.90 no.6-10 1981; v.90 no.6-9 1981