"IT IS HERE!" poster promoting Squirrel Week, and federal statements of support for squirrel killing
Commission of Horticulture Records, Rodent Control Division (ODC1:29(18)); Department of Agriculture, Administration, Confidential Newsletters, April 13, 1918 Newletter (F3741:2397) California State Archives; Government Publications (#H475.S7), California State Library; University of California