1. 1
    Published 1981
    ...H 1 .S678 n...
    Journal
  2. 2
    Published 1980
    ...H 1 .S678 n...
    Journal
  3. 3
    Published 1988
    ...H 62 .A1 .N532...
    Serial
  4. 4
    Published 1982
    ...H 29 .S471...
    Serial