1. 1
    by Churchman, Geoffrey B.
    Published 1990
    ...HE 3550.5 .C563...
    Book
  2. 2
    by Churchman, Geoffrey B.
    Published 1992
    ...HE 3550.5 .Z7 .S7 .C563 s...
    Book
  3. 3
    by Churchman, Geoffrey B.
    Published 2001
    ...HE 3550.5 .C563 2001...
    Book