 |
       |
| Date | Months |
|---|---|
| 1961–1973 | Complete |
| 1974 | Mar, Jun |
| 1975 | Apr, Jul |
| 1976 | Mar, Jun, Dec |
| 1977 | Apr, Jun, Dec |
| 1978 | Mar, Jun, Sep, Dec |
| 1979 | Apr, Jul, Nov |
| 1980 | Jul, Nov |
| 1981 | Jun, Fall |
| 1982–1986 | Winter, Spring, Summer, Fall |
| 1987 | Summer, Fall |
| 1988 | Summer |
| 1989 | Fall |
| 1990 | Spring, Fall |
| 1991 | Spring |
| 1995 | Winter (Vol. 34, No. 1) |
| 1996 | Spring (Vol. 34, No. 2) |
| 1996 | Winter (Vol. 35, No. 1) |
| Jul |
