H. Veltman

Decomposition of jarosite

W. Kunda, H. Veltman, 1979 .

Copper and elemental sulphur from chalcopyrite by pressure leaching

I. H. Warren, V. Mackiw, H. Veltman, 1967 .

Direct leaching zinc-sulfide concentrates by Sherritt Gordon

F. A. Forward, H. Veltman, 1959 .

Direct acid pressure leaching of chalcocite concentrate

S. Pellegrini, V. Mackiw, H. Veltman, 1967 .