DALLDORF G, GIFFORD R (1951). "Clinical and epidemiologic observations of Coxsackie-virus infection". N. Engl. J. Med.244 (23): 868–73. PMID14843332. doi:10.1056/NEJM195106072442302.
DALLDORF G, GIFFORD R (1951). "Clinical and epidemiologic observations of Coxsackie-virus infection". N. Engl. J. Med.244 (23): 868–73. PMID14843332. doi:10.1056/NEJM195106072442302.