Croft, P.S., 1986
A Key to the major groups of British Freshwater Invertebrates
A key to enable beginners to identify living freshwater invertebrates (of length 2mm or more) down to family.
This is a companion volume to "A Key to the major groups of British Terrestrial Invertebrates", in the same series.
||Field Studies Council (FSC)
||1 85153 181 6
||Aims to cover all freshwater invertebrates of length 2mm or more.
||With x8 or x10 hand lens (also useful to examine under a Stereo Microscope).