Archaeology Data Service (ADS) has a searchable library of reports

http://archaeologydataservice.ac.uk/archives/view/greylit/query.cfm

British and Irish Archaeology online has a searchable library of reports

http://www.biab.ac.uk/

COPAC

COPAC Herefordshire search

http://copac.ac.uk/about/


http://copac.ac.uk/search?&keyword=archaeology&title=hereford%2A

British Library

http://www.bl.uk/onlinegallery/index.html

National Library of Wales

http://darganfod.llyfrgell.cymru/primo_library/