The Sevenoaks Gravel Pit Reserve a joint WAGBI-Wildfowl Trust Experimental Reserve /
Harrison, Jeffery Graham.
Harrison, Pamela.
Redland Limited.
Harrison Zoological Museum Trust.
[Chester] WAGBI [Sevenoaks] Redland Ltd s.l. Harrison Zoological Museum Trust
1974
Bibliography: p.111
Bradbourne Pit Wildfowl Reserve