Mehay, Stephen L. <br/><br/>
The effectiveness of workplace drug prevention policies : does 'zero tolerance' work? 

 - Cambridge, Mass. :  National Bureau of Economic Research,  1999 
 - 33 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DRUG ABUSE SURVEYS--UNITED STATES<br/>SUBSTANCE ABUSE--UNITED STATES--STATISTICS
<br/><br/><label>LC Class. No.: </label>HV5825  / M432E