Vol 13 No 1
January/February

Vol 13 No 2
March

Vol 13 No 3
April

On cover:

Vol 13 No 4
May

Vol 13 No 5
June/July

Vol 13 No 6
August

Vol 13 No 7
September

Vol 13 No 8
October

Vol 13 No 9
November

Vol 13 No 10
December 1977/ January 1978