title: Tumor heterogeneity, invasion and metastasis. June 3-5, 1981, Saskatoon, Sask., Canada.
mesh_terms: D000818:Animals; D002633:Chemotaxis; D002999:Clone Cells; D004351:Drug Resistance; D007167:Immunotherapy; D007694:Killer Cells, Natural / Q000276:immunology; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D009374:Neoplasms, Experimental / Q000276:immunology / Q000473:pathology* / Q000628:therapy; D012525:Saskatchewan