Riley Richard A.
Rivas Hercilio
Rivero Mayela
RM Materiais Refratarios Ltda.
Roberts William R.
Robertson Struan Douglas
Robinson Kenneth R.
Robinson Leon
Rockey Keith V.
Rodriguez Domingo P.
Roehl H. Randolph
Roeper Michael
Rojas Daysi
Roman Jean-Philippe
Romero Nilia C
Romic Chemical Corporation
Rose Kenneth Dale
Rosenthal Joel W.
Roth Ernest R.
Rothlisberger Henri