00903cam a22002531a 4500 e 21000522 DLC 20260227111212.0 860711s1921 dcua f001 0 eng c e 21000522 (OCoLC)13857732 U.S. Off. of Educ. Library ABAU ABAU DLC premarc L111 .A6 1921, no. 22 LB1771 .A3 1921 Cook, Katherine Margaret O'Brien. State laws and regulations governing teachers' certificates / by Katherine M. Cook. Washington : G.P.O., 1921. 244 p. : ill., maps ; 23 cm. Bulletin / Department of the Interior, Bureau of Education ; 1921, no. 22 Includes index. Teachers Certification United States States. Bulletin (United States. Bureau of Education) ; 1921, no. 22 20482 20482