Avian leukemia viruses: interaction with their target cells in vivo and in vitro.
D000818:Animals; D001353:Avian Leukosis / Q000209:etiology; D001354:Avian Leukosis Virus / Q000235:genetics; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D002471:Cell Transformation, Neoplastic; D002478:Cells, Cultured; D003673:Defective Viruses; D006378:Helper Viruses