1. Isolation of viruses related to Echo virus type 9 from outbreaks of aseptic meningitis;Boissard;Lancet,1957
2. An epidemic illness associated with a recently recognized enteric virus (Echo virus type 4). II. Recognition and identification of the etiologic agent;Chin;Am. J. Hyg.,1957
3. Association of Echo virus type 6 with aseptic meningitis;Davis,1956
4. Outbreaks of aseptic meningitis caused by type 6 Echo virus;Karzon,1957
5. Preparation of monolayer tissue cultures from human amniotic membranes;Lahelle;Acta Pathol. Microbiol. Scand.,1956