You will find that this unbranded textbook is a great backup for your studies.
Product Tag: Niosh
Niosh Full Complete Guide to Chemical Hazards – August 2007 Edition 3rd Print
This textbook covers a lot of ground without feeling overwhelming.
NIOSH Pocket Guide to Chemical Hazards – September 2010 Edition [Spiral-bound]
You will find that this textbook has a handy index of symbols and abbreviations.
Brand New SEALED NIOSH Pocket Guide to Chemical Hazards – September 2007 Edition
What stands out about this textbook is the logical flow from basic to advanced ideas.