Subject Source: Library of Congress Subject Headings
Found in 2 Collections and/or Records:
Additional papers of the British Trust for Ornithology relating to the BTO/EGI Rookery Census
Extents: 3.33 Linear metres (22 physical shelfmarks)
Papers of the British Trust for Ornithology (BTO), 1875-1975.
Extents: 2.1 Linear metres (14 physical shelfmarks)