There is a very good website produced by Anglia Ruskin University, which explains the Harvard referencing system in great detail, it is at http://libweb.anglia.ac.uk/referencing/harvard.htm

This is a great 3 minute tutorial on how to use Historical Abstracts. It is from Lucy’s Netvibes site, under the category, Online Tutorials.

http://www.netvibes.com/nulibarts#Online_tutorial

http://www.netvibes.com/nulibarts#Online_tutorial