"From Amsterdam in 1905 to Surat in 2005" International Federation of Chemical, Energy, Mining and General Workers' Unions World Conference of the Diamond, Gem, Ornament and Jewellery Production Section, Boksburg, South Africa, 22nd and 23rd of November 2004 ; conference working document (2004)
Dt. Ausg. u.d.T.: "Von Amsterdam 1905 nach Surat 2005"