Hartmut F. W. Hoft (Hoft, Hartmut F. W.)

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  Computing with Mathematica
  by Hartmut F. W. Hoft, Margret Hoft
  Softcover, Academic Press, Incorporated, ISBN 0123516668 (0-12-351666-8)
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  Computing With Mathematica
  by Margret Hoft, Hartmut F. W. Hoft
  Softcover, Academic Pr, ISBN 0123516609 (0-12-351660-9)