Ritchie, J., 1921
Scottish hairworms (Nematomorpha, Gordiidae), their occurrence, habits, and characteristics; with a key for the discrimination of the species recorded from Britain
An account of Hairworms with a key to UK species.
||The Scottish Naturalist
||111-115, 136-142, 255-262
||All the British species known at the time. It's not obvious how all the species here relate to those currently accepted as British.
||Under a Compound Microscope.