Model Engineer - Vol. 147 - Issue: 3654 / 3rd - 16th April 1981

Model Engineer - Vol. 147 - Issue: 3661 / 17th - 31st July 1981

Model Engineer - Vol. 147 - Issue: 3665 / 18th - 30th September 1981

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

Model Engineer - Vol. 147 - Issue: 3648 / 2nd - 15th January 1981

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

Model Engineer - Vol. 147 - Issue: 3653 / 20th - 31st March 1981

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