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1by Friedrichs Kurt Otto
Gordon and Breach cop. 1965Book -
2by Friedrichs Kurt Otto
Springer-Verlag 1973Book -
3by Friedrichs Kurt Otto
Birkhäuser 1986Book -
4Book
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5Book
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6Book
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7by Friedrichs Kurt Otto, Summer Seminar on Applied Mathematics
American Mathematical Society 1965, cop. 1965Book