Holdings

Date                  Vol.    No.
1964–1965        39      11–12
1965–1966        40      complete
1966–1967        41      complete
1967–1968        42      complete
1968–1969        43      complete
1969–1970        44      complete
1970–1971        45      complete
1971–1972        46      1–4, 7–12
1972–1973        47      1–2, 4–9, 11–12
1973–1974        48      1