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- Great Britain. Forestry Commission48
- Institute of Economic Affairs (Great Britain)41
- Linnean Society of London29
- British Geological Survey27
- Geological Survey of Great Britain26
- Great Britain. Central Statistical Office24
- Great Britain. Ordnance Survey22
- Organisation for Economic Co-operation and Development17
- Great Britain16
- Natural Environment Research Council (Great Britain)16
- Joint Nature Conservation Committee (Great Britain)15
- Estuarine and Coastal Sciences Association12
- Edlin, Herbert L. (Herbert Leeson), 1913-197611
- British Museum (Natural History)10
- Butler, David, 1924-10
- Darwin, Charles, 1809-188210
- Geological Society of London10
- Rose, Richard, 1933-10
- Timber Development Association10
- Booth, P. (Philip), 1964-9