Volume 49 (1980)

No. 6 pp. 2093–2428 December
No. 5 pp. 1649–2092 November
No. 4 pp. 1205–1648 October
No. 3 pp. 847–1204 September
No. 2 pp. 435–846 August
No. 1 pp. 1–434 July