TY - RPRT TI - Typing of ECHO viruses by a complement fixation technic. AU - P HALONEN AU - L ROSEN AU - R J HUEBNER PY - 1958 DO - 10.3181/00379727-98-23954 UR - https://pubmed.ncbi.nlm.nih.gov/13554556/ ID - 13554556 ER -