AU  - Fraenkel Conrat,Heinz
TI  - Design and function at the threshold of life : The viruses / 
T2  - Academic Paperbacks
U1  - 576.64 
PY  - 1964///
CY  - New York : 
PB  - Academic Press , 
KW  - Virology
KW  - Threshold of Life
ER  -