Greene J (1996). "The three C's of etiology". Wide Smiles. مؤرشف من الأصل في 2007-06-30. اطلع عليه بتاريخ 2007-08-20. Discusses several examples of the medical usage of the term etiology in the context of فلح الشفة والحنكs and explains methods used to study causation.
Greene J (1996). "The three C's of etiology". Wide Smiles. مؤرشف من الأصل في 2007-06-30. اطلع عليه بتاريخ 2007-08-20. Discusses several examples of the medical usage of the term etiology in the context of فلح الشفة والحنكs and explains methods used to study causation.