(1974). Electro-optical equipment in mechanical handling and sorting: Conference sponsored by the Postal Engineering Section of the Manipulative and Mechanical Handling Machinery Group and co-sponsored by the Institution of Electronic and Radio Engineers, London, 7 May 1974. London: Mechanical Engineering Publications.

Electro-optical Equipment in Mechanical Handling and Sorting: Conference Sponsored By the Postal Engineering Section of the Manipulative and Mechanical Handling Machinery Group and Co-sponsored By the Institution of Electronic and Radio Engineers, London, 7 May 1974. London: Mechanical Engineering Publications, 1974.

Electro-optical Equipment in Mechanical Handling and Sorting: Conference Sponsored By the Postal Engineering Section of the Manipulative and Mechanical Handling Machinery Group and Co-sponsored By the Institution of Electronic and Radio Engineers, London, 7 May 1974. London: Mechanical Engineering Publications, 1974.