title: Contact historadiography of nervous tissue impregnated with thorotrast.
mesh_terms: D000818:Animals; D004285:Dogs; D006652:Histological Techniques; D008722:Methods; D013116:Spinal Cord / Q000033:anatomy & histology*; D013679:Technology, Radiologic; D013911:Thorium Dioxide
chemical_list: D013911:Thorium Dioxide