--subdivision Etiology under individual diseases and types of diseases, e.g. Cancer--Etiology; Tuberculosis--Etiology and subdivision Diseases--Etiology under individual organs and regions of the body, e.g. Heart--Diseases--Etiology
Aetiology Cross infection : Hospital infections / edited by John V. Bennett, Philip S. Brachman ; foreword by Maxwell Finland, Donald E. Craven ; foreword by William A. Altemeier
Afar (African people) -- Antiquities : The boundaries of ancient trade : kings, commoners, and the Aksumite salt trade of Ethiopia / Helina Solomon Woldekiros