Unwin, D.M., 1984
A Key to the Families of British Beetles
Well illustrated key enabling identification to family level. There are companion volumes on families of Hemiptera and Diptera by the same author.
||Field Studies Council (FSC)
||1 85153 166 X
||Line drawings in the text.
||Under a Stereo Microscope.
||Mounted (carded) or pinned specimens.
||Mostly straigtforward, although counting tarsal segments on small specimens can be challenging (a droplet of water on the tarsi helps).