The collections at both libraries can be searched online.

Harefield

Books

Select HAR in the Library Selection drop-down menu to access the book catalogue at Harefield.

http://www.lhlcatalogue.nhs.uk/searchPublications.aspx?Ym9va35+LTF+LTE=?

Journals

Select HAR in the Library Selection drop-down menu to access Harefield journal holdings.

Royal Brompton

Search the collections on the Imperial College Library website.

Select National Heart & Lung Institute Library from the dropdown menu to limit your search to the Royal Brompton site.