Calothy, G [Concentration of virus by polyethylene-glycol]. [electronic resource] - Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles Nov 1967 - 1764-5 p. digital Publication Type: Journal Article Subjects--Topical Terms: MethodsPolyethylenes--pharmacologyVirus CultivationViruses--drug effects