Text ( visual ) : unmediated Colonialism and language policy in Viet Nam / John DeFrancis. -- The Hague : Mouton , c1977. -- xv, 293 p. : ill., facsims., maps ; 24 cm. -- (Contributions to the sociology of language ; 19). -- Includes Vietnamese glossary ; Bibliography: p. [263]-278 ; Includes index. -- ISBN 9027976430 ; (BA04603792) ; https://ci.nii.ac.jp/ncid/BA04603792 Author Heading(s): DeFrancis, John. -- Classification(s): LCC : JQ820.L3 ; DC : 301.2/1 ; NDC6 : 829.39. -- Subject Heading(s): LCSH : Vietnam -- Languages -- History ; LCSH : Vietnamese language -- Alphabet -- History