Tunisia (M. Bel Hadj Amor)

Australia (P. Alpen)
Peru (L.H. Valdivia Avalos)
Canada (D.W. Ware)
Saudi Arabia, Kingdom of (A.Y.A. Bukhari)
Greece (M.-A. Papageorgiu)
Panama (M. Ivankovich de Arosemena)
Sri Lanka (D.H.J. Abeyagoonasekera)
Tanzania (G.S. Magombe)