Microfiche copies, made in 1995, of Operation Seafarer record cards, 1969-1970. The originals are held by the Joint Nature Conservation Committee in Aberdeen.

The data on the cards was used in the preparation of The Seabirds of Britain and Ireland, by Stanley Cramp, W.R.P. Bourne and David Saunders (Collins: 1974), and The Status of Seabirds in Britain and Ireland, by Clare Lloyd, Mark L. Tasker and Ken Partridge (Poyser: 1991).