Paul D. Hillyard

published for The Linnean Society of London and The Estuarine and Coastal Sciences Association by Field Studies Council 1996 Synopses of the British fauna . New series ; no.52

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P.D. Hillyard and J.H.P. Sankey

Published for the Linnean Society of London and the Estuarine and Brackish-water Sciences Association by E.J. Brill 1989 2nd ed Synopses of the British fauna new ser., no. 4

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