1. 1
    Published 1988
    ...HD 171 .A15 .L253...
    Conference Proceeding Book
  2. 2
    Published 1988
    ...HQ 809.3 .U5 .C783...
    Conference Proceeding Book
  3. 3
    Published 1989
    ...HQ 471 .P8363...
    Conference Proceeding Book