Boyd, Mark F.2012-01-232012-01-2319202012-01-23http://hdl.handle.net/2152.3/315Three rat species referred to as Norway, Black, and Gray hanging from string. The majority of the rats caught were of the Norway species.4.5 x 6.5 in. black-and-white photographimage/jpegen-USBubonic plagueExterminationGalveston Plague LaboratoryRats -- ControlRats as carriers of diseaseUnited States Public Health Service