31. Deti! beregite zuby! Publication: Moskva : Gosudarstvennoe izdatelʹstvo, 1921 Subject(s): Oral HealthOral HygieneHealth Education
32. The role of saliva in maintaining oral homeostasis Publication: [Bethesda, Md. : Medical Arts and Photography Branch], 1986 Subject(s): Oral HealthHomeostasisSaliva