1. 1
    Published 1985
    Journal
  2. 2
    Published 1993
    Book
  3. 3
    by Ossom, Ekpo
    Published 1996
    Book
  4. 4
    by Duncan, Ronald C., 1936-
    Published 1995
    Book
  5. 5
    by Kraemer, J. H.
    Published 1944
    Book
  6. 6
    Published 1975
    Serial
  7. 7
    Published 1996
    Book