Kirchner, R E <br/><br/>
The applicability of a helicopter patrol procedure to diverse areas: A cost-benefit evaluation.  [electronic resource] 

 -  Journal of applied behavior analysis  1980 
 - 143-8 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0021-8855 
<br/><br/><label>Standard No.: </label>10.1901/jaba.1980.13-143  doi