1. 1
    by Mann, Rica Isabella Moller
    Published 1943
    ...HE 297.5 .Z7 .S7 .M282...
    Thesis Book
  2. 2
    by Churchman, Geoffrey B.
    Published 1992
    ...HE 3550.5 .Z7 .S7 .C563 s...
    Book
  3. 3
    by Taylor, Ivan D., 1932-
    Published 2005
    ...HE 368.2 .Z6 .C2 .T242 2005...
    Book