Helinski, Raymond F. books & textbook
Mining Roof Bolting Machine Safety: A Study of the Drill Boom Vertical Velocity
Ambrose, Dean H. Bartels, John R. Kwitowski, August J. Helinski, Raymond F. Gallagher Ph.D., Sean McWilliams, Linda J. Battenhouse Jr., Thomas R. Centers for Disease Control and Prevention, U.S. Department of Health and Human Services National Institute for Occupational Safety and Health
CreateSpace Independent Publishing Platform /2005-05-31 Paperback / 62 Pages
isbn-10: 1494383683 / isbn-13: 9781494383688
