TY - RPRT TI - Tree squirrel hepatitis B virus: antigenic and structural characterization. AU - M A Feitelson AU - I Millman AU - B S Blumberg PY - 1986 DO - 10.1073/pnas.83.9.2994 UR - https://pubmed.ncbi.nlm.nih.gov/2422663/ ID - 2422663 ER -