"A Guide to Safe Scaffolding was initially prepared ... by David L. Potts. ... The information in this guide was reviewed in 2011"--P.  of cover.; "Revised 2/11"--P.  of cover.; Includes bibliographical references (p. 32).
Rev.; "Revised 6/11"--P.  of cover.; "Bobby R. Davis, reviewer"--P.  of cover.; "A Guide to Preventing Heat Stress was prepared by Clifton D. Crutchfield, Ph. D., CIH of the University of Arizona Division of Community and Environmental...
[Rev.].; "Revised 3/11"--P.  of cover.; "This edition of A guide to personal protective equipment is primarily adapted from USDOL/OSHA publication 3151--Personal protective equipment. Some parts are also based on an earlier edition written by...
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