Provisional atlas of the ptychopterid craneflies (Diptera : Ptychopteridae) of Britain and Ireland /
Stubbs, Alan E.
Harding, Paul T.
Dring, Julian C. M.
Joint Nature Conservation Committee (Great Britain)
Biological Records Centre (Institute of Terrestrial Ecology)
Huntingdon : Institute of Terrestrial Ecology,
1993.
Edited for the Biological Records Centre by Paul T. Harding  and Julian C.M. Dring.
On cover : Joint Nature Conservation Committee.
Includes bibliographical references and index.