Text ( visual ) : unmediated Clinical periodontology and implant dentistry. -- 3rd ed. / Jan Lindhe, Thorkild Karring, Niklaus P. Lang , editors. -- Copenhagen : Munksgaard , c1997. -- 973 p. ; 28 cm. -- First - 2nd. ed. published under the title: Textbook of Clinical periodontology. -- ISBN 8716120604 ; (BA33518835) ; https://ci.nii.ac.jp/ncid/BA33518835 Author Heading(s): Lindhe, Jan ; Karring, Thorkild ; Lang, Niklaus Peter