Rifkind, R. A., Godman, G. C., Howe, C., Morgan, C., & Rose, H. M. (1961). STRUCTURE AND DEVELOPMENT OF VIRUSES AS OBSERVED IN THE ELECTRON MICROSCOPE: VI. ECHO VIRUS, TYPE 9. The Rockefeller University Press.

Rifkind, Richard A., Gabriel C. Godman, Calderon Howe, Councilman Morgan, and Harry M. Rose. STRUCTURE AND DEVELOPMENT OF VIRUSES AS OBSERVED IN THE ELECTRON MICROSCOPE: VI. ECHO VIRUS, TYPE 9. The Rockefeller University Press, 1961.

Rifkind, Richard A., et al. STRUCTURE AND DEVELOPMENT OF VIRUSES AS OBSERVED IN THE ELECTRON MICROSCOPE: VI. ECHO VIRUS, TYPE 9. The Rockefeller University Press, 1961.