Books Publications, textbooks and industry guidance Heritage Building services literature from the mid-19th century, considered of historical interest. Journal Article Short articles on specific topics that is published regularly in issues, journals and magazines. Multimedia Items stored in electronic format, ie. microfiche and CD-ROM. Paper Papers from conferences, academia and projects on a specific topic. Report Documents using facts, testing and evidence to analyse specific topics. Special Collection Rare trade literature of unique value to our industry. Standard Building services standards from the UK and around the world.