%0 Journal Article
%T The stepping-stone hypothesis--marijuana, heroin, and causality
%J Chemical dependencies
%D 1982
%A O'Donnell, J. A.
%A Clayton, Richard R.
%V 4
%N 3
%P 229-241
%X <p>[Abstract unavailable]</p><p>Language: en</p>
%G en
%I Spectrum Publications
%@ 0276-5608
%U http://dx.doi.org/