1. 1
    Published 1985
    ...HC 59.7 .S678...
    Book
  2. 2
    Published 1991
    ...HT 127.5 .A881...
    Book
  3. 3
    Published 1993
    ...HC 59 .D498...
    Book
  4. 4
    Published 1989
    ...HC 665 .N2767 7th...
    Conference Proceeding Book