Walter Schempp (Schempp, Walter)

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  Boolean Methods in Interpolation and Approximation
  by W. Schempp, F. J. Delvos
  Hardcover, Longman Scientific & Technical, ISBN 0470215836 (0-470-21583-6)
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  Complex Contour Integral Representation of Cardinal Spline Functions
  by W. Schempp
  Softcover, Amer Mathematical Society, ISBN 0821850067 (0-8218-5006-7)
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  Harmonic Analysis on the Heisenberg Nilpotent Lie Group, With Applications to Signal Theory
  by Walter Schempp
  Softcover, John Wiley & Sons Inc, ISBN 0470203749 (0-470-20374-9)
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  Multivariate Approximation Theory III
  by Karl Zeller, Walter Schempp
  Hardcover, Springer Verlag, ISBN 3764317388 (3-7643-1738-8)
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  Multivariate Approximation Theory IV: Proceedings
  by Walter Schempp, C. K. Chui, Mathematisches Forschungsinstitut Oberwolfach, Karl Zeller
  Hardcover, Birkhauser, ISBN 0817623841 (0-8176-2384-1)
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  Multivariate Approximation Theory: Proceedings of the Conference Held at the Mathematical Research Institute at Oberwolfach, Black Forest, February 4-10, 1979
  by International Symposium on Multivariate Approximation Theory, 2D, Blac, Walter Schempp, Karl Zeller
  Softcover, Springer Verlag, ISBN 3764311029 (3-7643-1102-9)
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  Special Functions: Group Theoretical Aspects and Applications
  by R.A. Askey, T.H. Koornwinder, W. Schempp
  Hardcover, Kluwer Academic Print on Demand, ISBN 9027718229 (90-277-1822-9)