title: Isolation of drug-resistant clones of Ehrlich ascites tumor cells.
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology*; D002286:Carcinoma, Ehrlich Tumor; D002999:Clone Cells / Q000187:drug effects*; D004351:Drug Resistance; D005020:Ethyl Methanesulfonate; D006151:Guanosine / Q000031:analogs & derivatives*; D009153:Mutagens; D009368:Neoplasm Transplantation; D013866:Thioguanine / Q000031:analogs & derivatives
chemical_list: D000970:Antineoplastic Agents; D009153:Mutagens; D006151:Guanosine; D005020:Ethyl Methanesulfonate; D013866:Thioguanine