Text ( visual ) : unmediated County library service to rural schools / by Edith A. Lathrop. -- Washington : G.P.O. , 1930. -- v, 53 p. : ill., maps ; 24 cm. -- (Bulletin / Department of the Interior, Bureau of Education ; 1930, no. 20). -- At head of title: United States, Department of the Interior, Office of Education ; Bibliography: p. 49-53. -- (BB19888106) ; https://ci.nii.ac.jp/ncid/BB19888106 Author Heading(s): Lathrop, Edith A. ; United States. Bureau of Education