Defective Friend spleen focus-forming virus: pseudotype neutralization by helper-specific antisera.

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@article{Eckner1971DefectiveFS, title={Defective Friend spleen focus-forming virus: pseudotype neutralization by helper-specific antisera.}, author={B J Eckner and Richard A. Steeves}, journal={Nature: New biology}, year={1971}, volume={229 8}, pages={241-3} }