McCambridge, J; Strang, J; (2006) The reliability of drug use data collected in the classroom: what is the problem, why does it matter and how should it be approached? Drug and alcohol review, 25 (5). pp. 413-8. ISSN 0959-5236 DOI: https://doi.org/10.1080/09595230600868496 Full text not available from this repository.