This is a reproduction of the original 1980 publication, compiled by Linda Wood and colleagues, and based on a series of leaflets that were issued by the library. We are re-issuing it now in electronic format purely in the interest of historical research. We have resisted the temptations of hindsight to change or comment on the text, other than to remove out of date contact details, and to correct spellings or typographical errors. We have repaginated the document and added a contents page.
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