books.google.com - A majority of the Fortune 500 Companies implement some practice of workplace drug testing in their company policies. This practice was first initiated by President Ronald Reagan when he ordered federal agencies to drug test federal employees involved in sensitive positions as well as positions involving...http://books.google.com/books/about/Beating_Drug_Tests_and_Defending_Positiv.html?id=sADqtOR56lkC&utm_source=gb-gplus-shareBeating Drug Tests and Defending Positive Results
