Gilbert, O., 1951. Bats? Parasitic Diptera. Transactions of the Suffolk Naturalist?s Society 7: 134., p.208.

Fountain, H.C., 1951. Two cases of heavy infestation of small mammals by fleas and acari. Entomologist?s Monthly Magazine 87: 1-2., p.160.

Woodroffe, G.E. & Southgate, B.J., 1951. Birds? nests as a source of domestic pests. Proceedings of the Zoological Society of London 121: 55-62., p.575.

Williamson, K., 1951. Ectoparasites. Report of the Fair Isle Bird Observatory (1950): 40-41., p.568.