1. Piotrowski, Z. A.: The Rorschach inkblot method in organic disturbances of the central nervous system. J. N. M. D., 86:525, 1937.
2. Bailey, P., and Cushing, H.: A Classification of the Tumors of the Glioma Group on a Histogenetic Basis with a Correlated Study of Prognosis. Lippincott. Philadelphia. 1926.
3. Bailey, P.: Intracranial Tumors. Thomas. Springfield. 1933.
4. Bodian, D.: A new method for staining nerve fibers and nerve endings in mounted paraffin sections. Anat. Rec., 65:89, 1936.
5. Eros, G.: Method for fuchsin staining of the network of cerebral blood vessels. Arch. Path., 31:215, 1941.