Spontaneous Chimerism in Mammals: A Critical Review.- Quantitative Autoradiography: Statistical Study of the Variance, Error and Sensitivity of the Labeling Index (Thymidine-H3 and DNA Synthesis).- Renal Siderosis. Morphology, Etiology, Pathogenesis and Differential Diagnosis. With Special Reference to Traumatic Hemolytic Anemia.- Morphogenesis of Anencephaly and Related Malformations.- The Chediak-Higashi Syndrome: A Comparative Review.- Author Index.