J. E. Springer
Ole Berthelsen
Tex.) Continental Scientific Drilling Workshop (1985 Houston
Gene L LaBerge
Victor Mureșeanu
David A. Willoughby
LeRoy A. Hemish
William H Diment
Robert D. Hettinger
Alun Whittaker
Unknown Author
R. P. Monicard
Kathleen M. Johnson
Thomas C. Michalski
Lisa E. Osterman
United States. Army. Corps of Engineers.
Sullivan Machinery Company
I͡Uriĭ Fedorovich Alekseev
British Standards Institution.