549,585 RECENT Recent advances in periodontology. - Amsterdam [etc.l : Excerpta Medica, - 25 cm Vol. 2 : Proceedings of the fourth International Academy of Periodontology Meeting, Istanbul, 17-20 September, 1990 /eds. Steven J. Cold, Marshall Midda, Serdar Mutlu. - 1991. - XIII, 515 s. il., wykr. (International Congress Ser. ; nr 957 ISBN 0 444 81424 8