Front Cover; International Review of Cytology, Volume 47; Copyright Page; Contents; List of Contributors; Chapter 1. Responses of Mammary Cells to Hormones; Chapter 2. Recent Advances in the Morphology, Histochemistry, and Biochemistry of Steroid-Synthesizing Cellular Sites in the; Chapter 3. Epithelial-Stromal Interactions in Development of the Urogenital Tract; Chapter 4. Chemical Nature and Systematization of Substances Regulating Animal Tissue Growth; Chapter 5. Structure and Function of the Choroid Plexus and Other Sites of Cerebrospinal Fluid Formation.