Columbia subject headings:
Harvard subject headings:
Drug abuse--Research--Methodology--Congresses.
Marginality, Social--Research--Methodology--Congresses.
People with social disabilities--Research--Methodology--Congresses.
Princeton subject headings:
Drug abuse--Research--Methodology--Congresses.
Marginality, Social--Research--Methodology--Congresses.
People with social disabilities--Research--Methodology--Congresses.