1984 12
1985 02 04 06 08 10
1986 02 04 06 08 09 10 11 12
1987 02 04 06 09 10 12
1988 02 04 06 08 09 10 11 12
1989 01 02 03 04 05 06 08 09 10 11 12
1990 Vol7.
Each row contains monthly publications for the listed year:

For example: 01 = January issue ... 06 = June issue ... SP = Special etc.