Model Engineer - Vol. 147 - Issue: 3660 / 3rd - 16th July 1981

Model Engineer - Vol. 147 - Issue: 3663 / 21st - 31st August 1981

Model Engineer - Vol. 147 - Issue: 3657 / 15th - 31st May 1981

Model Engineer - Vol. 147 - Issue: 3649 / 16th - 31st January 1981

Model Engineer - Vol. 147 - Issue: 3671 / 18th - 31st December 1981

Model Engineer - Vol. 147 - Issue: 3655 / 17th - 30th April 1981

Model Engineer - Vol. 147 - Issue: 3664 / 4th - 17th September 1981

Model Engineer - Vol. 147 - Issue: 3670 / 4th - 17th December 1981