"Periodontics Congresses." . . "European Workshop on Periodontology (1 : 1993 : Ittingen)" . . . "European Workshop on Periodontology (1993 : Ittingen)" . . . "Periodòncia." . . "Periodontics." . . "Parodontologie Congrès." . . "Periodontal Diseases." . . "Parodontologie." . . "Parodontopathie." . . "European Workshop on Periodontology (1st : 1993 : Ittingen, Switzerland)" . . . "European Workshop on Periodontology (1r : 1993 : Thurgau)" . . . "Congressos i conferències." . . "European Workshop on Periodontology. <1, 1993, Ittingen>." . . "Humans Periodontal diseases." . . "Ittingen <1993>" . . "Periodontia." . . "European Workshop on Periodontology (1st : 1993 : Thurgau, Switzerland)" . . . . . . "Proceedings of the 1st European workshop on periodontology"@en . "Proceedings of the 1st European workshop on periodontology" . . . "Conference proceedings" . . . . "Congresses" . . . . . "Proceedings of the 1st European Workshop on Periodontology, Charter House at Ittingen, Thurgau, Switzerland, February 1-4, 1993"@en . "Proceedings of the 1st European Workshop on Periodontology, Charter House at Ittingen, Thurgau, Switzerland, February 1-4, 1993" . . "Ittingen (1993)"@en . . . . . . . . . . "Proceedings of the 1st European workshop on periodontology, Charter House at Ittingen, Thurgau, Switzerland, Feb. 1-4, 1993" . . "Kongreß"@en . . "Proceedings of the 1st European workshop on periodontology : Charter house at Ittingen, Thurgau, Swizerland ; February 1-4, 1993" . "Proceedings of the 1st European workshop on periodontology, Charter House at Ittingen, Thurgau, Switzerland, February 1-4, 1993" . "Conference papers and proceedings"@en . "Conference papers and proceedings" . . "Proceedings of the 1st European Workshop on Periodontology : Charter House at Ittingen, Thurgau, Switzerland, February 1-4, 1993" . . . . . . . "Kongress" . . . . . . . . "Periodontal Diseases congresses." . . . .