1. 1
    Published 1978
    ...HF 3968 .U5 .M345...
    Book
  2. 2
    Published 1988
    ...HF 51.5 .E96...
    Journal
  3. 3
    Published 1978
    ...HF 1630 .E96...
    Book
  4. 4
    Published 1980
    ...HF 51.5 .E96...
    Journal
  5. 5
    Published 1983
    ...HF 4030.5 .Z6 .N532...
    Serial