Shop › A Key to the Adults of the British Emphemeroptera. SP47. JM Elliott & UH Humpesch Image 1 of 1 A Key to the Adults of the British Emphemeroptera. SP47. JM Elliott & UH Humpesch £10.00 Add To Cart Added! You Might Also Like Turbulence in Lakes & Rivers - SP29 The Parasitic Copepoda & Branchiura of British Freshwater Fishes - SP46 Equatorial Equilibrium - EE1 Freshwater Biology and Ecology Handbook (digital copy with £5 donation) Key to British Freshwater Rotifera - SP38 - Currently out of print