1. 1
    Published 1977
    ...HD 69 .D4 .C7482...
    Book
  2. 2
    by Martino, Joseph Paul, 1931-
    Published 1993
    ...HD 38 .M386 1993...
    Book
  3. 3
    by Fishburn, Peter C.
    Published 1970
    ...HD 69 .D4 .F532...
    Book