Ricketts John
Riley Richard E.
Ritzenthaler Hugo
Ritzenthaler Hugo A.
Roberts Dale E.
Robinson Ronald
Robotti Franco
Rogers, Jr. Leslie N.
Roling Thomas N.
Root Ernest F.
Rossini Tommaso
RTR Incorporated
Rudolph Bergsma Trust
S.I.S. Geotecnica s.r.l.
Sakura Instrument Co. Ltd.
Salaun Thierry
Samuelson Scott R.
Saskatchewan Research Council
Sato Yoshitake
Sauermann Industrie