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

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

Model Engineer - Vol. 147 - Issue: 3667 / 16th - 31st October 1981

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

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

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

Model Engineer - Vol. 147 - Issue: 3669 / 20th - 30th November 1981

Model Engineer - Vol. 147 - Issue: 3650 / 6th - 19th February 1981