1. 1
    Published 1995
    ...HC 681 .G721...
    Book
  2. 2
    Published 1990
    ...HQ 1867.5 .N263...
    Conference Proceeding Book
  3. 3
    Published 1994
    ...HB 3693.4 .P117 1994...
    Book
  4. 4
    Published 1992
    ...HQ 1866.7 .M558...
    Journal
  5. 5
    Published 1996
    ...HD 4875 .V2 .S884...
    Book