Provisional atlas of British hoverflies (diptera, syrphidae) /
Ball, Stuart G.
Morris, Roger K. A.
Biological Records Centre (Centre for Ecology and Hydrology (Great Britain))
Joint Nature Conservation Committee (Great Britain)
Huntingdon : Biological Records Centre,
2000.
At head of title: Centre for Ecology and Hydrology.
At foot of title: Joint Nature Conservation Committee.