Washington, DC: Bi-monthly. 1967–
Keep sets 1 and 2 – extras for exchange.
| Date |
Vol |
No |
| Set 1 |
| 1975 |
VII |
1 |
| 1977 |
IX |
2–5 |
| 1978 |
X |
1–6 complete |
| 1979 |
XI |
1–6 complete |
| 1980 |
XII |
1–6 complete |
| 1981 |
XIII |
1, 3–6 |
| 1982 |
XIV |
1–6 complete |
| 1983 |
XV |
1–6 complete |
| 1984 |
XVI |
1, 3–6 |
| 1985 |
XVII |
1–6 complete |
| 1986 |
XVIII |
1–6 complete |
| 1987 |
XIX |
1–5 |
| 1988 |
XX |
1–6 complete |
| 1989 |
XXI |
1–6 complete |
| 1990 |
XXII |
1–6 complete |
| 1991 |
XXIII |
1–6 complete |
| 1992 |
XXIV |
1–6 complete |
| 1993 |
XXV |
1, 2, 3, 5, 6 |
| 1994 |
XXVI |
1–3 |
| 1995 |
XXVII |
1 |
| Set 2 |
| 1980 |
XII |
3 |
| 1982 |
XIV |
1, 4, 6 |
| 1983 |
XV |
1, 2, 4–6 |
| 1984 |
XVI |
6 |
| 1985 |
XVII |
1–4 |
| 1987 |
XIX |
6 |
