Holland Richard S.
Kita John F.
Kurt Ewald Heinz
Kuvshinov Viktor A.
Landmark West Ltd.
Leavell Charles
Mandanis Georges
McCallops John A.
Mechelke Klaus
Meneghini Robert J.
Musso Mario
Okawa Tokan
P. G. Drilling Equipment & Accessories
Pate III William F.
Percussion Drilling, Inc.
Pillow Dan L.
Radtke Gerd
Raman Rune E. B.
Ranck Gerald L.
Rusin Sergei V.