1. 1
    Published 1986
    ...HC 683.5 .P218 p...
    Journal
  2. 2
    Published 1997
    ...HJ 98.4 .A2 .P218...
    Serial
  3. 3
    Published 1999
    ...HJ 98.4 .A2 .P218...
    Serial
  4. 4
    ...HJ 98.4 .A2 .P218 suppl....
    Serial
  5. 5
    Published 1993
    ...HC 683.5 .P218 e...
    Journal
  6. 6
    Published 1988
    ...HC 683.5 .Z9 .P83 .P218...
    Serial