title: [Reaction of precipitation on paper as a method of control of purification of rickettsial preparations].
mesh_terms: D002623:Chemistry Techniques, Analytical; D002980:Climate; D055633:Immune System Phenomena; D010209:Paper; D012282:Rickettsia Infections / Q000276:immunology*
keywords: CHEMISTRY, ANALYTICAL; RICKETTSIAL DISEASES/immunology