Padron:DSB
"DSB". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. 1970–80. ISBN 978-0-684-10114-9. {{cite ensiklopedya}}: Invalid |ref=harv (tulong)CS1 maint: date auto-translated (link)
"DSB". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. 1970–80. ISBN 978-0-684-10114-9. {{cite ensiklopedya}}: Invalid |ref=harv (tulong)CS1 maint: date auto-translated (link)