Simeone, R S <br/><br/>
A plan for estimating the number of "hardcore" drug users in the United States.  [electronic resource] 

 -  The International journal of the addictions  May 1995 
 - 637-57 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0020-773X 
<br/><br/><label>Standard No.: </label>10.3109/10826089509048751  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bias<br/>Crime--statistics & numerical data<br/>Cross-Sectional Studies<br/>Data Collection<br/>Humans<br/>Illicit Drugs<br/>Incidence<br/>Models, Statistical<br/>Psychotropic Drugs<br/>Sampling Studies<br/>Substance-Related Disorders--epidemiology<br/>United States--epidemiology