Discuss 2011 TLVs® and BEIs® Book and Guide to Occupational Exposure Values Now Available! http://www.safteng.net/index.php?option=com_content&view=article&id=776:2011-tlvsr-and-beisr-book-and-guide-to-occupational-exposure-values-now-available&catid=48:general-safety-topics&Itemid=301 Fri, 24 May 2013 01:39:11 --500 JComments http://www.safteng.net/index.php?option=com_content&view=article&id=776:2011-tlvsr-and-beisr-book-and-guide-to-occupational-exposure-values-now-available&catid=48:general-safety-topics&Itemid=301#comment-94 Mario Maturana A Fri, 05 Aug 2011 09:32:18 --500 http://www.safteng.net/index.php?option=com_content&view=article&id=776:2011-tlvsr-and-beisr-book-and-guide-to-occupational-exposure-values-now-available&catid=48:general-safety-topics&Itemid=301#comment-94