Pure agraphia of kanji due to thrombosis of the Labbe vein. 論文 Takanori Yokota・Sumio Ishiai・T Furukawa・Hiroshi Tsukagoshi ·1990-04-01 ·『Journal of Neurology Neurosurgery & Psychiatry』 53(4) pp. 335-338 doi:10.1136/jnnp.53.4.335