Columbia subject headings:
Conference on the Limitation of the Manufacture of Narcotic Drugs (1931 : Geneva, Switzerland)
Narcotics.
Opium trade.
Harvard subject headings:
Conference on the limitation of the manufacture of narcotic drugs, Geneva, 1931.
Narcotics
Opium trade
Princeton subject headings:
Conference on the limitation of the manufacture of narcotic drugs, Geneva, 1931.
Narcotics.
Opium trade.