TY  - BOOK
AU  - Butzer, P L, ed
TI  - Linear operations and approximation, 2v; proceedings of the conference held at the oberwolfach mathematical research institute, black forest, August 14-22, 1971
U1  - 515.624 B985L 
PY  - 1972///
CY  - Basel
PB  - Birkhauser Verlag
ER  -