R. J.  Berry, ?The ecology of an island population of the house mouse.?, Journal of Animal Ecology 37(2): 445-470., 1968.

D. A.  Humphries, ?Mating between subspecies of the Sand Martin flea, Ceratophyllus styx Rothschild (Siphonaptera, Ceratophyllidae).?, Entomologist?s Monthly Magazine 104: 219-224., 1968.

 and Holmes, R. G., ?Some ectoparasites of the coypu (Myocaster coypus) in Eastern England.?, Journal of Animal Ecology 37(2): 471-481., 1968.

M. B.  Usher, ?Megabothris turbidus (Rothschild), a flea new to Scotland.?, Entomologist?s Gazette 19(1): 43-44., 1968.

M. B.  Usher, ?A new species of bird flea from the Manx Shearwater in Scotland.?, Entomologist?s Gazette 19(3): 173-180., 1968.

M. B.  Usher, ?Notes on Ctenophthalmus nobilis (Rothschild) (Siphonaptera: Hystrichopsyllidae) and other mole fleas in Scotland.?, Entomologist?s Gazette 19(4): 223-228., 1968.