1. 1
    Published 1977
    ...HD 7077.5 .N532 h...
    Journal
  2. 2
    Published 1981
    ...HB 3692.5 .A3 .Q1...
    Journal
  3. 3
    Published 1980
    ...HD 7077.5 .N532 h...
    Journal
  4. 4
    Published 1972
    ...HF 4030.5 .A1 .N532...
    Journal
  5. 5
    Published 1968
    ...HD 7262.5 .N5 .S797...
    Journal