Hankin, E.H. On the Epidemiology of Plague. Jour. Hyg., 5, 1905, pp. 48–83. A comprehensive discussion of the disease and its spread, several pages devoted to rats and fleas; evidence for and against the theory that rats and fleas are the principal carriers of the disease.
Herzog, Max. The Plague, Bacteriology, Morbid Anatomy & Histopathology, Including the Consideration of Insects as Plague Carriers. Biological Laboratory Bureau of Govt. Laboratories, Manila, Oct., 1904. Reviews the evidence regarding the possibility of fleas carrying plague; describes a new rat flea (Pulex philippinensis); records experiments with fleas and cites a case of bubonic plague in a child in which the infection was possibly carried by Pediculi.
McCoy, G.W. Plague Bacilli in Ectoparasites of Squirrels. Pub. Health Reports, Pub. Health and Mar. Hospt. Ser., Vol. XXIV, No. 16, Apr. 16, 1909. Experiments with fleas and lice from infected squirrels demonstrating presence of plague bacilli.
McCoy, G.W. The Susceptibility of Gophers, Field-mice and Ground-squirrels to Plague Infection. Jour. of Infec. Diseases, Vol. 6, 1909, No. 3, pp. 283–288. Gophers highly resistant, field-mice moderately susceptible and ground-squirrels very susceptible to plague.
Mitzmain, M.B. Insect Transmission of Bubonic Plague: a Study of the San Francisco Epidemic. Ento. News, 19, No. 8, 1908, pp. 353–359. Fleas obtained in examination of 1,800 rats. Attempt to locate source of rat and flea introduction.
Morton, F.M. Eradicating Plague from San Francisco. Report of the Citizens' Health Com. and an account of its work. San Francisco, 1909. Discusses the epidemics, methods of transmission, methods of fighting, etc.
Rucker, W.C. Plague Among Ground-squirrels in Contra Costa Co., Cal. Pub. Health Reports, Pub. Health and Mar. Hospt. Ser., Aug. 27, 1909. Reports of human cases supposed to be connected with plague among ground-squirrels. Plague among squirrels; habits, methods of fighting, etc.
Rucker, W.C. Fighting an Unseen Foe. Sunset Mag., XXII, No. 2, Feb., 1909. Story of the fight against plague in San Francisco.
Shipley, A.E. Rats and Their Animal Parasites. Jour. Eco. Biology, Vol. III, No. 3, Oct. 28, 1908. List of species of ecto- and endoparasites.