Mello, P S [Periodontal ligament. Study of collagen through the optic microscope]. [electronic resource] - Revista de farmacia e odontologia Aug 1969 - 15-7 p. digital Publication Type: Journal Article ISSN: 0034-8201 Subjects--Topical Terms: CollagenDentistryHistocytochemistryPeriodontium--anatomy & histology