George Friedrichs was born in 1940.
Paul Friedrichs was born in 1940.
Helmuth Friedrichs was born in 1899.
Bob Friedrichs was born on 1906-08-30.
Hanns-Joachim Friedrichs was born in 1927.
Kurt O. Friedrichs was born on 1901-09-28.
Fritz Walter Paul Friedrichs was born in 1882.
Hanns Joachim Friedrichs was born on March 15, 1927, in Hamm, Germany.
Bob Friedrichs was born August 30, 1906, in Cincinnati, OH, USA.
Helmuth Friedrichs died in 1945.
Hanns-Joachim Friedrichs died in 1995.
Bob Friedrichs died on 1997-04-15.
K.O Friedrichs has written: 'Pseudo-differential operators'